state has to prove, and that's that there was sexual intercourse, and that the girl was under the age of 16. people under the age of 16 cannot legally consent to sexual contact or sexual intercourse, and the law is there to protect our kids. but i think as young as the girl is in this case -- and she's very young -- zack's really young too, even though he's treated as an adult because he's 17 years old. >> the prosecution is arguing that zack took advantage of his age and popularity to pressure a younger girl into having sex. but a recent psychological evaluation prepared by the defense found that zack doesn't fit the typical profile of a sex offender. the report also revealed zack is struggling with depression and anxiety, a development that has his mother, carrie, on edge. how has all this affected zack