nathan walters was killed by somebody high on heroin. i want to meet with nathan's mother, michelle. she's a veteran teacher in a local elementary school. she wants to meet with the man responsible for her only son's death. and i want to find out why. good to meet you. >> good to meet you, too. welcome to twin lakes. >> good to be here. it is so massive i got lost several times. how long have you lived here? >> 24 years. >> i grew up in a small town. wasn't this small, but when a bad thing happened, everybody knew about it. >> i have had too many student funerals i have had to go to. we are a gateway between chicago, milwaukee, minneapolis. the interstate system is a breeding grounds for opoids. i talk to my kids about this all the time. you have to make good choices, and your choices have consequences. and if one child changes their mind because they see my tears or they understand what my family has had to go through because of somebody else's bad choices, then it's worth my time. and it's worth my effort and it is worth my tears becaus