. >> katherineham let sat down with "america tonight" just five months after she learned her only child had passed away. with no answers to why he made the unthinkable choice. >> so when you were firtime for -- aljazeera.com notified of his disappearance,-m what was going through your head? >> immediately, i was looking for him, and we filed a police report right away. it never crossed my mind that my child would die by suicide. and it never dawned on me that he would jump off a bridge. so much so, that whield we were while we were searching in the washington heights area, i remember saying to someone, well at least we know something, we know he didn't jump. the irony of that statement is critically important for other parents. because the stereotype of what suicide looks like is not really what it is. i never knew that suicide was the number 2 cause of death for college students. i never knew that. >> reporter: what katherine did know is that for two years timothy had been a gifted student-athlete at the university of pennsylvania. he set school records impressing his coaches and teamm