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 teammates but in his sophomore year his behavior started to change. >> i may or may not be there i have a paper -- >> he was already seeing mental health professionals privately at the request of his parents. but when they learned he had been removed from his beloved track team after missing practices, the concerned parents pulled their son from school to take a leave of absence in september of 2014. >> i wish i did know more about it in hind siding because i feel responsible as his mom. you kn