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hi, richard louis with a news update. millions of cubans still without electricity after the country's main power plant suddenly shut down. a lack of oil and deteriorating infrastructure led to the systems collapse. there's concern now that a prolonged power outage could paralyze their economy. hamas confirmed the death of its leader in a tribute to prime minister netanyahu, saying the hostages will not be released until there is a cease- fire and israel removes troops from gaza. the u.s. senate partners are pushing hard to bring an end to the year-long war. for now, back to dateline. atel. h and her on again, off again boyfriend, keith reed, were going through a rough patch around the time he was shot dead. detectives had their eye on kimberly, but they were about to hear from another woman in keith's life who would change the course of the investigation. once again, here's dennis murphy with "at close range." dennis murphy (voiceover): of the many details concerning the homicide of well-liked school superintendent keith

reed, perhaps none was more perplexing than the murdered man's cell phone. why was the phone company reporting its location as harrisburg, pennsylvania, four hours southeast of the crime scene? i thought maybe it was a mistake. you know, no one knew of anyone that he would know in harrisburg. dennis murphy (voiceover): in the hours after keith's body was found, relatives frantically called that phone, desperate to get a voice on the other end. the sheriff was shocked on monday when one of them hit pay dirt. he said, i just called keith reed's phone, and somebody answered it. i said, what? that's a holy cow moment. oh, yeah. dennis murphy (voiceover): but it turns out the person saying hello was a construction foreman on a bridge near harrisburg. the phone had been found on some scaffolding, which suggested to detectives someone in a car had tried to toss the phone into the river. it landed on a bridge deck that had been set up to do repairs to the bridge. it was a very lucky break for us. what are the odds? not one in a billion.

dennis murphy (voiceover): while this recovered cell phone was on its way to the fbi lab, crime scene analysts spent the next day at keith reed's house, scouring the property for clues. district attorney david foley knew the clymer community, on edge about a school related shooting, was anxious for the case to be solved. but an arrest looked a long ways off. it would be nice to announce an arrest very quickly, but you can't. you can't calm people down, can you? no. dennis murphy (voiceover): but then, wednesday afternoon, something totally out of the blue happened that turned the investigation upside down. the sheriff was in a closed door meeting when his secretary interrupted. i thought it was a family emergency. and her face looked like she'd seen a ghost. and she said, sheriff, you have a phone call i think you need to take. dennis murphy (voiceover): a panic stricken woman was on the phone. she needed to talk to the sheriff immediately. the sheriff returned to his office so he could take the phone call. mary taglianetti (on phone): i don't know. i don't-- joe gerace (on phone): ok, just relax. mary taglianetti (on phone): ok, i'm sorry. dennis murphy (voiceover): her name was mary taglianetti. she was calling from virginia. no one in keith reed's life, including his daughter,

megan, had ever heard of her. that name mean anything to you, this mary woman? not at all. anybody in the family, did it ring a bell? no. dennis murphy (voiceover): megan's older sister, katelynn, didn't know the name either, but would soon realize this mary was a woman her dad had taken to dinner back in 2010 during an off period with kimberly. i remember him saying that he was going out to dinner, but yeah, no, nothing ever came from it. dennis murphy (voiceover): but now this mary was on the phone. she was very, very upset. mary taglianetti (on phone): [crying] joe gerace (on phone): stay with me. this is going to be ok. relax. joe gerace: i kept her on the phone purposely as long as i could. and while we were talking, i had my staff scrambling to get somebody in law enforcement to her home. dennis murphy (voiceover): almost 400 miles south, officers in virginia brought mary to an interview room. she was the second woman in three days investigators were speaking to about the murder of the superintendent.

i'm glad they have these here. i just might need them. oh, ok. dennis murphy (voiceover): mary says she and keith first developed a relationship on match.com. she'd separated from her husband and had moved with her four children to upstate new york. after 11 years of marriage, she says she was trying to figure out how to get back into the dating game. i was lonely and just needed someone to talk to, friends. dennis murphy (voiceover): mary says she was intrigued by the superintendent and responded when he sent her a message saying hello. and i said, yeah, you're really good-looking. but we started talking, and we had some things in common. and then he asked if he could call me. dennis murphy (voiceover): they talked on and off for a couple of months, she says. keith, who always had a soft spot for someone in need, provided emotional support, as she struggled to find her footing as a newly separated woman. i kind of felt lost, you know. i didn't know what to do or where to go next, and he was great.

he was really encouraging. dennis murphy (voiceover): it was sometime in the summer of 2010, she told the detectives, that she met her online match for their one and only date. he took me to dinner, and we had a night together. dennis murphy (voiceover): it was little more than a one night stand. mary says she decided to try to make things work with her husband. keith reconciled with his girlfriend. we both just kind of said good luck to each other. that's about it. so it was like a handshake and goodbye, huh? pretty much, yeah. dennis murphy (voiceover): but a couple of years later, mary says, her marriage was once again coming undone. in the spring of 2012, she tried to friend keith on facebook. he didn't accept the request, but the superintendent did write her a message. he sent me a message back, asking me how i was. and i told him that i wasn't happy, and things weren't going too well. dennis murphy (voiceover): she says they started calling each other on the occasional evening. keith, struggling with his relationship,

and mary, lonely in hers, confided in each other. was that something nice in your life at that time, mary? yes. dennis murphy: what was it doing for you? it was a piece of happiness. like, i felt a little more fulfilled. dennis murphy (voiceover): but, she says, their phone conversations did, at times, get sexual. was it, hi, how are you's, but did it also get a little steamy, mary? yes. dennis murphy (voiceover): still, it hardly seemed like a big deal relationship. could a single date and some suggestive phone calls really add up to murder? in mary's mind, yes, but she hadn't called the sheriff to confess to the crime. nor had she called to point her finger at a potentially jealous girlfriend. no, mary had someone else entirely in mind. and the clue to who killed the superintendent could be found on his computer. andrea canning (voiceover): coming up, the secret comes out. it was this long thing about, don't you dare contact my wife ever again. and if you do, you're going to be sorry.

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dennis murphy (voiceover): the internet had given renewed life to the cyber relationship between school superintendent keith reed and mary taglianetti. now mary would explain to detectives in virginia why she feared their amorous digital trail had led to his death. i'll try to give you everything that i can. yeah. dennis murphy (voiceover): mary had met her husband, rob taglianetti, in college.

he was an historian with the marines. she was mostly a stay-at-home mom to their four kids. she told detectives that their 11 years together had been difficult at times. but something had happened that august which pushed the marriage to the brink. she was at the doctor's when her husband discovered an email-- his wife thanking reed for the previous night's phone sex. he said, do you mind telling me who keith reed is? you knew what he'd come across, huh? yes. dennis murphy (voiceover): mary, who had struggled through the pain of separation once, now decided to try to keep her family together. i was really thinking about the kids. and i just thought, you know, they deserve to be in their home with their father and the mother. dennis murphy (voiceover): but her husband was adamant, she says. if he was going to stay, there was a condition attached. she'd have to hand over her passwords. mary told detectives he later logged on to her email account and fired off a blistering message to reed. but it was this long thing about, don't you dare

contact my wife ever again. and if you do, you're going to be sorry because i have the emails, and i'll post them all over your school. dennis murphy (voiceover): the superintendent responded simply and directly-- back off. stay away from me or i'll take action, and tell your wife the same. dennis murphy: and that should have been the end of things. it should have been the end of things. but it wasn't. no. dennis murphy (voiceover): after reading keith's email, mary said rob started getting dressed. she asked him where he was going. and he said, where do you think i'm going? i said, you're going to go see keith? and he said, well, i guess you know me. does he take off in the car? he leaves late, 11 o'clock at night. dennis murphy (voiceover): that all happened, she said, the night before investigators suspected keith reed had been killed. i had thought in my mind, like, there's no way he's going to go all the way up there just to try to beat this guy up. that's what you thought this was-- confrontation, a fistfight? oh, yeah. he had gotten in fistfights before. dennis murphy (voiceover): for the past few years, mary says, she had been concerned about her husband's

tripwire anger. he would have episodes where i would be afraid of him, or the children would be afraid of him. dennis murphy (voiceover): it had caused their separation two years before. and now she worried her husband had lost all perspective. i hear you saying it may have been a love triangle only in rob's mind. yes. but that was not what was going on. no, it was more like a connective friendship, and it was flirting. dennis murphy (voiceover): she says she emailed keith several warnings and tried to reach her husband throughout the next day, but her calls went straight to voicemail. i was just thinking i was going to get a phone call from the police saying your husband was acting like an idiot. but i didn't hear anything from anybody. dennis murphy (voiceover): mary says rob returned home saturday morning, telling her keith had been out of town. instantly, i was like, oh, good. i was so happy. like, i was so relieved. dennis murphy (voiceover): relieved, she told the detectives, until four days later,

when she ran an internet search to see what her husband could have found out about the superintendent. there it was-- keith's picture, saying 51-year-old keith reed shot to death. i couldn't believe it. like, i lost my breath, and i was shocked. and i knew right away that it had to be rob. dennis murphy (voiceover): to investigators looking for the killer in upstate new york, mary's husband made more than a lot of sense. there was keith reed's cell phone found off this bridge in pennsylvania. harrisburg is on the way to virginia. see, now, that makes sense, too, that piece of the puzzle. dennis murphy (voiceover): and something else clicked. remember that man who'd appeared at clymer central school, asking to speak to the superintendent? investigators sent a freeze frame from the school security cameras down to the interview room in virginia. does this look like him? yes, that's him.

yes, mm-hmm. mary identifies those stills as being her husband, so we know that it's him in the school. dennis murphy (voiceover): now authorities had a suspect, but where was he? mary said that a few days after her husband returned, he told her he got a new job and had quit his position as an historian at the marine base in quantico. rob, she said, had also packed up some things and taken off, leaving behind a cryptic note about going on a camping trip to clear his head. at the time, it hadn't made sense to her. i didn't understand why he didn't want to take us. you know, if he's going to take a couple of weeks off for a vacation, why wouldn't he take his family? dennis murphy (voiceover): but now everything added up. the authorities issued a bolo, a be on the lookout, for anthony rob taglianetti. a manhunt was underway. we are actively looking for this individual to pick him up for questioning. and we consider him to be armed and dangerous. where are you? where are the children? we were at a hotel. they were worried that he was going to try

to come back and look for us. dennis murphy (voiceover): as the authorities searched for rob taglianetti, keith reed's family up in new york state gathered to say their goodbyes. the church in his hometown was too small for the hundreds of mourners, all the people whose lives the educator had touched. brother kevin was a pallbearer. dennis murphy: did you speak that day at the service? i couldn't. my son had to hold me up. you were a wreck at that point. oh, yeah. completely. dennis murphy (voiceover): keith's three daughters, though, did find the strength to speak. years before, they'd almost lost their father in a motorcycle accident. he'd persevered. now they were determined to make him proud. i knew that he wouldn't want us to be sad and depressed. i knew he would want it to be a celebration of his life. dennis murphy (voiceover): it was that same afternoon that taglianetti's gold buick was spotted speeding down a road near a national park in virginia. make, the plate. pull it over and take him into custody without incident.

dennis murphy (voiceover): anthony rob taglianetti was charged with the second degree murder of keith reed. to the prosecutor, the theory of a jealous husband killing his perceived rival connected all the dots. but wait, the defense said. the real story of who was to blame had yet to be heard. rob taglianetti was merely the puppet, the defense would argue. it was his wife, mary, a cunning and manipulative woman who had pulled the strings. all she wanted was to be with keith reed, which means she's got to get rid of rob taglianetti. she's got to get him out of the picture. andrea canning (voiceover): coming up, an angry husband or, as the defense argued, a scheming wife? this is a story about manipulation and exploitation. andrea canning (voiceover): when "dateline" continues. [coughing] copd isn't pretty. i'm out of breath, and often out of the picture. but this is my story.

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arexvy is number one in rsv vaccine shots. dennis murphy (voiceover): a little more than a year after the killing of the popular school superintendent, keith reed, rob taglianetti went on trial for second degree murder. he pleaded not guilty. ladies and gentlemen of the jury-- dennis murphy (voiceover): the prosecutor told the jury that this case was about an explicit email that provoked a husband to kill. he sought out keith reed and shot him to death. dennis murphy (voiceover): the prosecutor laid out his case-- taglianetti caught here on tape at the superintendent's school the day of the murder, a gold buick like taglianetti's spotted in reed's driveway that afternoon.

and that soaked piece of paper found on reed's lawn? it was an atm receipt linked to taglianetti's bank account. what a "look at me" detail, huh? wonderful. dennis murphy (voiceover): there were more incendiary emails, too, a flurry of them, the prosecutor said, sent to keith reed the night before the murder-- capital letter stuff, exclamation points. i'm going to get you. i'm going to take care of you. you don't mess with me and my family. dennis murphy (voiceover): and all but "say good night" forensic evidence found in taglianetti's car. in a case under the driver's seat lay a 357 revolver. it was wrapped in a printout of his wife's steamy email. and on the gun itself? david foley: we had keith reed's blood not only on the barrel, but in the barrel. that was the gun that was pressed up against keith reed's back. dennis murphy (voiceover): and a big surprise found on taglianetti's laptop, the prosecution said-- an exit strategy. hours before his arrest, rob taglianetti bought a one-way ticket to israel.

his ultimate idea was to get out of the country. dennis murphy (voiceover): but as convincing as the prosecution's case appeared, defense attorney ned barone told the jury it was not at all what it seemed. this is a story about manipulation and exploitation. dennis murphy (voiceover): rob taglianetti, he said, was a us marine with a sterling record, a devoted husband who loved his wife and wanted nothing more than to keep his family together. his wife, mary, on the other hand, was a master manipulator, he said, dead set on destroying the marriage any way she could. rob taglianetti, she wanted out of her life. keith reed, she wanted to be with him. she did whatever she needed to do to accomplish both those ends. dennis murphy (voiceover): take rob's discovery of his wife's sexual email. the defense suggested mary left that email open on purpose. why? maybe because a confrontation between the two men was her goal. why else, he said, would she not have alerted the authorities to her husband's impending showdown with the superintendent?

if you're really worried of what your husband's going to do to another individual, wouldn't you call the officials? wouldn't you call the police? she waits literally days to call law enforcement. dennis murphy (voiceover): mary taglianetti, a prosecution witness, says she's appalled by the defense's theory and finds it preposterous. how was killing keith reed and getting her husband thrown in prison supposed to solve any problems? i didn't do anything of that on purpose. did you willingly provoke him, as the attorney suggests, even leaving open that email to-- no, no, no. dennis murphy: --light the torch? i wished i would have never left that email open. because that's the story the jury is hearing about you, that you're driving the events. yeah, that's not true at all. dennis murphy (voiceover): but the defense attorney went even further. maybe those blistering emails from taglianetti to reed had really been written by mary. while she denies it, he implied it could be a way for her to frame her husband, to show that he left the house with murder on his mind. there is no corroborating evidence

whatsoever of mary's testimony that rob authored those emails. dennis murphy (voiceover): to try to prove that point, the defense attorney cited a phrase in one of those messages that he said rob taglianetti would never have used. ned barone: a marine doesn't refer to himself as a "former marine." once a marine, always a marine. dennis murphy (voiceover): as for what did happen on keith reed's property the night he was killed, the defense did not concede that rob taglianetti was there. but if he had been, he said, maybe the superintendent was the aggressor. after all, he argued, it was his reputation that was at stake if the phone sex with mary was exposed. when someone's confronted with that situation, who knows what they could do? dennis murphy (voiceover): no, there were just too many unanswered questions to justify a guilty verdict, the defense told the jury during closing arguments. the prosecutor has failed to establish this case and every element of the charge beyond a reasonable doubt. man: all rise.

dennis murphy (voiceover): but it didn't take the jury long, just three hours, to come to its decision. woman: how does the jury find the defendant? juror: the jury found him guilty. dennis murphy (voiceover): guilty of the second degree murder of school superintendent, keith reed. rob taglianetti received 25 years to life in prison. he declined to interview with dateline. outside, kevin reed embraced his niece, a brother and father killed by the husband of a woman he had dinner with one time in his life, a woman near convinced keith believed to be single, so overwhelming. i thought i would feel relief or happy, but it just-- it wasn't. it was tough. dennis murphy (voiceover): among those thinking about keith reed's family is mary taglianetti. my heart goes out to them almost every day. and it's just-- it's a tragedy. and my heart breaks. dennis murphy (voiceover): the reed family is far from the only victim in this case.

kimberly roush had nothing whatsoever to do with the crime, yet she says she had to endure being questioned as a suspect, while simultaneously struggling with the grief of losing a man she loved and admired. he's an incredible man who loved life. his girls always came first. he was a wonderful father figure to my children as well. dennis murphy (voiceover): keith reed's three daughters now face a future without their dad. he won't be there to walk the two younger girls down the aisle, or be a loving granddad to their children, or take their daily phone calls. dennis murphy: when do you miss your dad the most, megan? when i drive home from work, i always grab my phone to call him. it's just hard without that person there that i talked to so often. dennis murphy (voiceover): it has been close to impossible for his family to understand it.

a devoted educator who did so much good for so many students ripped from their lives for something so mundane-- some online flirtation, a single dinner date, more flirtation two years later, and then three quick shots. it was a complete waste. lives of kids he could have helped-- who knows what path they would have taken if they had contact with him? dennis murphy (voiceover): the homicide brewed in cyberspace may sound perfectly modern, but the combustibles are as timeless as the winter feels here-- one woman, two men, and a jealousy that was all consuming. that's all for this edition of dateline. i'm andrea canning. thank you for watching.