Police in St. Paul, Minn. have identified a man they believe was in contact with 18-year-old university student Nadia Kajouji shortly before she committed suicide last spring. William Francis Melchert-Dinkel, 46, is a nurse with a previous record of abusing patients. Kajouji’s death shocked the city of Ottawa last year, and has mystified her family and friends. Though she was battling depression, her loved ones felt she could have turned things around, and were caught by surprise when she was found dead in the Rideau River a few weeks after she disappeared. Now, police in Minnesota say they’ve recovered a large amount of information from Melchert-Dinkel’s computer suggesting he was in contact with Kajouji, while a tipster has told them that he may have been encouraging, advising and assisting people to commit suicide through the Internet.