but detective peglow was no rookie. investigation into charlie tan and what happened inside that home was just getting started. >> one of the investigators found what appeared to be newly taken passport photos along with a list of prominent local defense attorneys. >> that's interesting. >> yes, sir. >> his story is "i had to do it" but you're not taking that at face value? >> correct. >>> coming up, a discovery on jim tan's computer triggers suspicions about his time of death. >> how many days prior is the last e-mail check? >> four. that was really a big thing for me. >> when "dateline extra" continues. >>> welcome back to "dateline extra." i'm tamron hall. police arrived at the home of jim tan to find him lying behind the desk in his home office, shot dead. his son charlie told police he did it. he said he was defending his mother. so case closed. far from it. let's return to dennis murphy with "house of secrets." >> deputies canvassed the neighborhood but no one heard the shotgun blast that killed jim tan. but then

but detective peglow was no rookie.tigation into charlie tan and what happened inside that home was just getting started. >> one of the investigators found what appeared to be newly-taken passport photos, along with a list of prominent local defense attorneys. >> that's interesting. >> yes, sir. >> the story is, i had to do it, but you're not taking that at face value. >> correct. >> coming up, a discovery on jim tan's computer triggers suspicion about his time of death. >> how many times earlier is the last e-mail check? >> four. hmmmmmm..... hmmmmm... [ "dreams" by beck ] hmmmmm... the turbocharged dream machine. the volkswagen golf gti. named one of car and driver's 10best, 10 years in a row. explore your treatment options with specialists who treat only cancer. every stage... every day.... at cancer treatment centers of america. learn more at cancercenter.com/experts not to be focusingo finaon my moderatepe. to severe chronic plaque psoriasis. so i made a decision to talk to my dermatologist about humira. humira wor

but detective peglow was no rookie.is investigation into charlie tan and what happened inside that home was just getting started. >> one of the investigators found what appeared to be newly-taken passport photos, along with a list of prominent local defense attorneys. >> that's interesting. >> yes, sir. >> the story is, i had to do it, but you're not taking that at face value. >> correct. >> coming up, a discovery on jim tan's computer triggers suspicion about his time of death. >> how many days prior is the last e-mail check? >> four. that was really a big thing for me. >> when "dateline extra" continues. maze his audience. great show. here you go. now he's added a new routine. making depositing a check seem so effortless. easy to use chase technology, for whatever you're trying to master. isaac, are you ready? yeah. chase. so you can. youthat's why you drink ensure. sidelined. with 9 grams of protein and 26 vitamins and minerals. for the strength and energy to get back to doing... ...what you love. ensure. always be y

but detective peglow was no rookie. his investigation into charlie tan and what happened inside that home was just getting started. >> one of the investigators found what appeared to be newly-taken passport photos, along with a list of prominent local defense attorneys. >> that's interesting. >> yes, sir. >> the story is, i had to do it, but you're not taking that at face value. >> correct. >> coming up, a discovery on jim tan's computer triggers suspicion about his time of death. >> how many days prior is the last e-mail check? >> four. (man) honey, what's a word for "large blaze"? (wife] fire. [man] thirteen letters. [wife] fire. [man] thirteen letters. [wife] really big fire! [burke] conflagration.seen it. covered it. we know a thing or two because we've seen a thing or two. ♪ we are farmers. bum-pa-dum, m-bum-bum-bum ♪ it's a very specific moment, the launch window. we have to be very precise. if we're not ready when the planets are perfectly aligned, that's it. we need really tight temperature controls. engineering

detective steve peglow of the monroe county sheriff's office. >> charlie told the deputy he was justet over some things, had come home to talk to people, and he was just working out some things and he would be okay. >> it was now late thursday night, almost the weekend. charlie didn't go back to school friday morning. and come monday, he wasn't at practice. >> wasn't really much i could do anyway other than text him, and he didn't respond. >> and then it was monday night. something awful. >> 911. what is the nature of your emergency? >> yes, i -- >> the caller so distraught confused the dispatcher. >> ma'am, i can't understand anything you're saying. does anyone need an ambulance? >> it was jean tan, charlie's mother. >> did you say you heard a shot? >> yes. >> does someone in the house have a gun? >> now the garbled story is coming into focus. shots fired, the husband of the house is shot dead. >> who's already dead? >> my husband. >> your who? >> my husband. >> are you in a safe spot? >> yes, i am. >> we need you to wait outside of the house for the police officer's safety. >> dete

but detective peglow was no rookie.is investigation into charlie tan and what happened inside that home was just getting started. >> one of the investigators found what appeared to be newly taken passport photos along with a list of prominent local defense attorneys. >> that's interesting. >> yes, sir. >> his story is "i had to do it" but you're not taking that at face value? >> correct. >>> coming up, a discovery on jim tan's computer triggers suspicions about his time of death. >> how many days prior is the last e-mail check? >> four. that was really a big thing for deputies canvassed the neighborhood but no one heard the shotgun blast that killed jim tan. but this wasn't a who don ie it. the son admitted he did it to protect his mom. >> receiving defense is what we'll listen to. if that's what happened, the law whether bear that out. we wanted to speak to him to determine that. >> that same night, charlie and his mother were taken down to the station to tell their stories. >> were you able to get a statement from the

but detective peglow was no rookie. his investigation into charlie tan and what happened inside that home was just getting started. >> one of the investigators found what appeared to be newly taken passport photos along with a list of prominent local defense attorneys. >> that's interesting. >> yes, sir. >> his story is "i had to do it" but you're not taking that at face value? >> correct. >>> coming up, a discovery on jim tan's computer triggers suspicions about his time of death. >> how many days prior is the last e-mail check? you can get a free wisconsin state id... ...before the next election. to get your free id, head to the division of motor vehicles. and take a few documents with you: (announcer) proof of your name, date of birth and us citizenship, like a certified birth certificate. if you don't have a birth certificate or other documents, the dmv can still help you get a free id for voting. for a complete list of the documents you can use, visit bringit.wisconsin.gov. neighborhood but no one heard the shotgun