. >> 19-year-old pravin varughese. a college sophomore at southern illinois university in carbondale. last seen leaving a house party, stepping into the bitter cold. >> i was like, where is this kid at? >> what caught your interest? >> the young man that contacted me was in distress. he says it's abnormal. he would not do this. something is wrong. >> monica learn that he came from chicago, six hour drive away. he was the adored middle child of immigrants from india. his dad was a respiratory therapist and his mom a nurse. >> thursday morning, i woke up with this awful feeling of something heavy in my chest. >> when the phone rang, lovely expected to hear his voice. he called home most evenings. it was not her son. it was a police officer. >> he said, well, your son is reported missing by his cousin. i screamed. everything change that moment. everything changed. >> lovely and her husband drove to carbondale and met their daughter at pravin's student apartment. there was no sign of her boy. >> my parents were mentally ou