zach anderson and his father lester join me. zach, the sentence being vacated.you first heard the news what went through your mind? >> it was really good news. the sentence was vacated. i was going to be resentenced. i'm not on probation. nice to get become to how i was living before. >> lester, i can't imagine what this experience has been like for you and for the rest of your family. >> yeah, it's been pretty stressful to say the least. the whole thing started in january. pretty much. so we have been dealing with this for quite a while. a lot of ups and downs. >> zashch, couldn't own a smart phone, use the internet, talk to any one under 17, or live in your parents' home. how difficult has that been? >> it's hard. i am just now becoming an adult. i just turned 20. not being able to use a smartphone or internet. it was really hard. i am really good with computer. i have been building them. i know the ins and outs of them. it's really hard. taking it from technologically advanced to very, very simple. >> lester, the fact that this girl's mother defended your son

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zach anderson was labelled a sex offender when he was 19. ra phillips reported on how this story unfolded last month. >> zach went on a racy dating app called "hot or not" hoping to meet a girl. he did. they had sex and that's when the problems began. how old did she say she was? >> she had told me she was 17. >> but she lied. she was actually 14. by law, he had committed a sex crime. he was arrested and convicted. now zach is on the same list of sex offenders as child molesters and pedophiles and his parents say that's a colossal mistake. when you heard those words, that your son was a sex offender, what was your reaction? >> it's a kb ee's a blatant lie. it's not true. it doesn't even fit our life-style. it doesn't fit how we raised our kids. >> even the girl's mother appeared in court testifying she didn't want zach labelled as a sex offender because "he's really not." we also obtained this letter that the girl in question gave zach's family. "i'm sorry i didn't tell you my age," she writes. "it kills me everyday knowing you are going thro