this is "nightline." triple jeopardy. he is convicted for murdering his wife twice. harris says he is innocent and his children agree. >> our dad had nothing to do with the disappearance. >> now he is on trial again. his defense pointing to evidence of a different killer. can he get a jury on his side? from the first steps to potty training. some parents think everything their kids do should be public knowledge. now a growing internet faction is push ing back against what they call over sharenting and they are not the only ones that don't like what they see. and give them five days and limited material and they can build this. she maple sugar shack. the floating getaway and the

waterfall cabin. why does this green team bicker so much? >> you are in a dangerous situation to be hollering at me right now. i'm going to get my partner a chill pill. >> but first the "nightline" five. >> it is chaos out there. the m-class sees in your blind spot. pulls you back to your lane. even brakes all by itself. it's almost like it couldn't crash even if it tried. the 2015 m-class. see your authorized dealer.

good evening. cal harris says he did not kim

his wife and his children agree. they believe the murder of their mom is an unsolved mystery. but prosecutors are convinced otherwise. so convinced, in fact they are putting this father of four on trial for a third time. how did it get to this snoint here's abc's matt gutman. >> reporter: when we sat down with cal harris he was about to go on trial for the murder of his wife michelle. so i asked the obvious question -- did you kill michelle? >> absolutely not. absolutely not. and the fact that i'm sitting here and having to go through this is just a horror show. >> reporter: if he sounds like he's been through the drill before, it's because he has. >> calvin harris has already been convicted twice for her murder. in 2007 and in 2009. >> one day there and then you go home the next day and ain't going to see them for a while and that's pretty crappy. >> reporter: for his four children this was a never-ending nightmare. >> we shouldn't have to live at home without both parents

especially because our dad didn't do >> reporter: when you think of the trial coming up do you think maybe there could be a third guilty verdict? >> you try not to. you want to stay in good spirits, and try not to think of that too much. >> reporter: this is the third time calvin harris has been put on trial for the same crime. >> calvin harris will face a third jury for the murder of his wife michelle. >> the number of trials here is very unusual, rare. >> reporter: cal and michelle met in 1987. they got married. he was a millionaire car salesman and she a pretty office worker. >> shaefs stunningly beautiful girl. she was fun. she had a great personality. >> reporter: they built this beautiful home in upstate new york and had four kids, but things started to fall apart. >> i was working with the business and working a lot of hours. we weren't able to spend as much time together alone as we had before. so that put -- started to put a

strain on our relationship. >> reporter: they decided to get a divorce but they were still living under the same roof. >> i couldn't change diapers and be with the kids during the day. i just tried to provide for her as best i could. >> reporter: but then on the night of september 11th in 2001 a night when most families were huddling together, michelle disappeared from the driveway of their house. >> hi, this is michelle. leave your name and number and i will call you back as soon as i can. >> reporter: you can hear her on voice mail. >> michelle, honey, this is mary calling. call me, honey, if you can. >> reporter: the growing concern of her friends as the hours past. >> where the hell are you? i you need to call me as soon as freaking possible. i'm worried to death about you. you need to call me. >> reporter: police were called to investigate on this police videotape you can see eerie signs of an idyllic family life interrupted. for the children then ages 2 to

7, it was almost impossible for you to grasp. so you don't have memories of your mom. you don't have any? you were 5. >> right. but i mean it is 15 years ago almost. a long tiechlt. >> reporter: their father was under suspicion. >> i knew they were focusing on me. whatever they asked for i gave them, phone records, financial information. >> reporter: police put him under constant surveillance. >> how did you find out they were tracking you? >> i put my truck in a shop and had a technician put it on a lift to service it normal maintenance and he came to my office a little while later and said you have to see. this we later determined it was a tracking device the state police put on the truck. >> reporter: four years after her disappearance, cal was arrested and charged with the murder of michelle. police said they found blood in the house. and they found a witness who said they heard him threaten her. >> no evidence that he ever threatened her in a way that really caused her fear.

people say things during an argument or divorce that they don't mean. >> reporter: do you remember the first time the indictment came down in 2005? >> yep. that was pretty rough. >> really sad. i felt like it wasn't fair because we didn't get to say bye. we came home one day after school and our aunt, haunt uncle and nan think were there. >> he had been taken away. >> yeah we didn't get to say good-bye. >> reporter: the case was largely circumstantial. still the jury found him guilty. just after the guilty verdict a bombshell. a new witness, this man, came forward who said he saw michelle after she was supposed to have been killed. arguing with another man at the foot of this driveway. cal was granted a new trial and again he was found guilty. astonishingly again the verdict was tossed out. this time because of procedural concerns. now on trial for the third time this time his kids now 16 17

18 and 20 are with him. >> we need to know what happened to our mother. we know our dad had nothing to do with her disappearance. we also know there are people out there with information who can help us get answers. >> reporter: did they ever ask you, daddy, did you kill me mom? >> no they have never asked me. they have never asked and i want to make sure they never ask me. i want to make sure there is no doubt in their minds. >> we feel like we need to tell people he's a great guy and no way he could have done something like this. >> reporter: did you ever ask him what happened that day? >> absolutely not. >> didn't have to. we didn't have any doubt he was involved. he's been there with us through everything and given us every opportunity we have asked for and had our back and it's our turn to do the same for him. >> reporter: his new lawyer says he has evidence that another man could have committed the crime. >> i think what the jury will see when they look at the entire

case is that there were other leads that the police should haveollowed up. >> reporter: but the third trial now in the 11th week hasn't been going quite the way he hoped it would. the judge allowed the testimony of the eyewitness who said he saw her at the foot of the driveway. >> kevin tubs is one of the people that saw the van outside of the family home in the driveway with a truck and two individuals talking in the very early-morning hours. >> reporter: but the judge would not allow evidence related to a new suspect saying much of it was circumstantial, while other portions were here say. >> i can't get in to a huge's mind as to why he is doing it. i can say that the individual seen with the victim an hour before she went missing is not a suspect or shouldn't be a suspect or the defense can't argue he's a suspect seems to belie logic. >> reporter: with only days to go, the fate of cal harris is

once again about to go before a jury. >> i have been ripped away from my kids three times now, from the indictment to the first trial to the second trial. here we sit. having to face another trial. no one should have to go through this. no one. >> reporter: for "nightline," i'm matt gutman, in new york. next how do you know when you have become one of those parents, over sharing on socia media. are pictures of potty training too much? a mom accused of crossing the line why are all these people so asleep yet i'm so awake? did you know your brain has two systems? one helps keep you awake- the other helps you sleep. science suggests when you have insomnia, the wake system in your brain may be too strong and your neurotransmitters remain too active as you try to sleep, which could be leading to your insomnia. ohh...maybe that's what's preventing me from getting the sleep i need! talk to your doctor about ways to manage your insomnia.

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i'll admit as a new father with an active instagram account story hits a little close to home. it is about parental oversharing in the age of social media and one mom angrily accused of telling the world too much about her kids. here's abc's paula faris. >> reporter: we all know them those parents who overshare on social media, capturing every meal, every outfit every moment. it is called from bath time to potty pics nothing seems off limits and everything is #too cute. >> they want to gush and want everyone to see the cutest picture of their kid doing that cute thing. >> reporter: one mom is paying the price for what their friends call a running commentary of her daughter's life. >> take sweet pictures of her reaching her milestones and when she wears cute outfits. >> reporter: jade received this

letter in the mail slamming her for oversharing. telling her to lay off with pics and updates, writing she crawls off the mat. we don't care. and she is 6 months old. big deal sglifts shocked. bullied and mommy shamed. >> reporter: it's one thing to look away. it is another thing -- it is cruel to leave a mean message to the parents. >> that wasn't about being a good friend that. is i want to hurt you and make you feel as though everyone is annoyed with you. >> reporter: jade is not alone. social media is flooded with proud parent pics marking milestones on-line with #like potty training and first steps. >> children are playing, if they do a project, if they are cooking, reading. >> reporter: mommy blogger and clinical psychologist says sh is one way social media is transforming parenting. >> it is an easy way to stay connected with people an see their kids grow up and what they are doing.

people don't have that much time in their day between working parenting, your marriage, whatever to stay in constant contact with friends. >> reporter: she posts photos of her three kids daily to thousands of followers on facebook, instagram and twitter. >> i don't think very deeply before i post anything as long as it is just a cute picture of my child. i figure i can just upload it. i try not to do 20 in a row. i don't think it issed bad. even if someone post s 25 pictures a day of their kids. if somebody doesn't want to see it, they don't want to see sglit blare says she doesn't want to see it and she shouldn't have to. >> i have seen everything you can pick, pictorials of childbirth, 25 pictures of a c-section. >> reporter: the anti-oversharenting crusader started a blog after she got fed up with her friends' constant update. >> her feed was 13 wrup

a day of baby getting up or going down and changing and feeding the baby. >> reporter: she said there is a fine line between keeping loved ones up to date and going too far. >> i don't know that everyone needs to know about a child wruzing a bathroom but if you want to post about it maybe hold the reins. >> reporter: author and mommy blogger agrees. sometimes less is more. after all those bathtub babies will one day grow up to be temperamental teenagers. >> before you post a picture of your child in a poopy diaper, take a moment and realize they are going to see it. >> reporter: she regrets the posts she made of her children years ago. >> when my kids were little they wrote a story called "love is in the air, not." the story leads off with "i hate my daughter." i look back and say was it worth it? probably not. >> reporter: sara says she doesn't share as much as her

kids' daily lives as she used to. >> know which stories are yours to tell because some of the stories belong to your kid and it's not right or our place to tell them. >> reporter: but it is those messy parenting moments that are the most relatable. as a mom of three, my life is far from perfect. probably the best feedback i got on instagram is a quick video of my daughter's birthday. we were singing "happy birthday" and my son wanted to blow out the candles and she screamed at him than got in a fight. >> it's my birthday. >> when you share the moments that aren't picture perfect it makes us feel great. not because we want somebody bad to happen to you but this is real. this is what parenting is like. it a messy, fun, crazy world. embrace your crazy, embrace it. >> embrace your crazy because every mom will tell you, it's crazy. >> reporter: for "nightline," i'm paula faris in new york. >> thank you paula. now speaking strictly as an objective journalist i believe

we have found the cutest instagram picture of my son alexander. he won't resent me for that when he grows up. next meet a team that may bicker a lot. >> i'm going to get my partner a chill pill. >> when they are in sync they can make magic in only five days. >> so cool>> announcer: abc news "nightline," brought to you by volkswagen volkswagen. . stop dreaming. it's time for the volkswagen stop dreaming start driving event. get a $1000 volkswagen credit bonus. hurry in, during the final days of the volkswagen stop dreaming start driving event and you can get 0% apr, plus a $1,000 volkswagen credit bonus on 2015 jetta and passat models. don't wait.offers end april 30th.

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think you are crafty a weekend home depot warrior, but trust me

you have got nothing on these days. here is my "nightline" coanchor byron pitts. >> reporter: king craftsmen of the northeast. >> i have taken more stuff out of a dumpster than i have thrown in a dumpster. >> reporter: he has an uncanny knack for making just about anything out of just about anything. >> that's a hornet's nest. you find them in the trees in the fall. >> reporter: he is one half of the duo behind the cabins featured on building wild. >> i can't afford a 60-foot deck. >> we can't afford to launch this and have it tip over in a lake. >> reporter: together they make up the cabin kings. >> he has what i don't have and i have what he doesn't have. you put the two of us together and we're inconvinceable. >> we're one person. >> we're complete. >> in each episode the team has five days to build a cabin for their clients. no running water, very little electricity. they are built using old material found on the owner's

property, making for truly one of a kind cabins. >> very rewarding to see the tears from the homeowner to make their dream come true. it's a lifetime experience. >> i like them fact we are able to help out those folks and give them that vacation. >> reporter: it is not fun and games when they are on the clock it is a business. >> you are in a dangerous situation to be hollering right now. i'm going to get my partner a chill bill pill. >> reporter: when they see eye to eye, the outcome an absolute original. >> he is self taught. >> i went to the school of hard knocks. whatever it takes to survive in the world. >> reporter: he came from meager beginnings and made do with whatever he could find. their ideas always aren't always conventional. >> this is great. how often do you build with a plane. >> reporter: there is a method that madness. they save clients time and money on every cabin imaginable. a hill top cabin. >> bed.

nice. >> this is crazy. >> reporter: a floating get away. >> this is so cool. >> reporter: and this maple sugar shack. >> oh, wow. holy -- >> this doesn't look like the thing we left. >> reporter: we wanted to get a look at the most outrageous cabins so we traveled to vermont, heart of cabin country. we snowmobiled our way through winding back woods, braved sub zero temperatures and climbed 1200 feet above sea level to check out, this the waterfall cabin. >> what do you think when you see all of this? >> i see no stress and relaxation. that's what i see. >> reporter: it's not just the view that makes the cabin special. >> the cabin kings named it miracle mountain. >> reporter: a coffee table turned glass floor. in the show you can see how spectacular the view is. and there's more. the master bedroom is made out of a refrigerator box truck and toilet like no other. >> step up in there.

>> all right. >> don't have to use it. just try it out. >> oh my god. >> out of control. >> oh, my lord. >> i took a spin inside the 360-degree restroom. >> wow, look at that. >> for the family, the outcome better than they dreamed. >> shut the hell up. >> oh my god! oh, my god! >> tough to call it a million dollar view, this is like a $10 million view. >> nope. can't put a price tag on it and probably never be for sale so i guess it won't matter what it is worth. >> reporter: for "nightline," i'm byron pitts in vermont. you can watch "building wild" tomorrow at 9:00 eastern on the national geographic channel. thank you for watching abc news tonight. we are on-line 24/7 at abcnews.com. thank you for watching and good night.

could you go to the store and get me some cough medicine?and if you leave now you can drop ally off on your way. drop ally off where? robert and gianni are coming over to watch the game. just go and take ally. she's got a sleepover at molly's. whoa...whoa. molly's? yeah, molly's. isn't molly's mom that peggy the--the scoutmaster- nazi-cookie-hitler? yeah. that's how she's liststed in the phone book.

come on. ion't want to see that peggy again. ray, come on, honey. that was over a year ago. the frontier girl cookie wars are over. i'm sure she won't beat you up this time. i did not get beat up. i slipped. come on, mommy, i'm ready to go! honey, mommy's too sick, so daddy's gonna take you. okay. come on, daddy! well, listen... how good of a friend is molly? because i gotta tell ya, i n't see it. ray! all right!