It's a former student at Lehigh University in Pennsylvania is under arrest tonight, accused of slowly poisoning his roommate by lacing his milk and his mouthwash with a dangerous chemical. The two had been roommates for years, the victim saying he thought they were friends, but the poisoning isn't the only charge the suspect is now facing. Here's ABC's Alex Perez. A Lehigh University student is behind bars tonight after police say he had been trying to kill his roommate for several months. Prosecutors say 22-year-old Yuka Yang from China faces several charges, including attempted homicide and aggravated assault. Authorities say the chemistry major carried out the attempted murder plot inside his dorm, slowly and discreetly putting a poisonous metal known as thallium and possibly other chemicals in his roommate Juwan Royal's milk and mouthwash. Mr. Royal experienced extreme pain in his lower extremities, as well as severe burning and numbness. Royal, who had been roommates with Yang for several years and thought they were friends.

first reported his symptoms to police back in March: dizziness, shaking, and vomiting. That's when his blood tested positive for thallium. Back in April, Yang was arrested and released on bail for damaging Royal's television, bed, and desk, and writing n-word get out of here in black marker. According to police, Yang told them he bought the poisonous chemical but planned to use it on himself if he didn't do well on exams. Royal is said to be recovering but still suffering from side effects. Tom Alex Perez on a disturbing case tonight. All right, Alex, thank you. Hi, everyone, George Stephanopoulos here. Thanks for checking out the ABC News YouTube channel. If you'd like to get more video show highlights and watch live event coverage, click on the right over here to subscribe to our channel. And don't forget to download the ABC News app for breaking news alerts. Thanks for watching.

Former Lehigh University student allegedly poisoned black roommate

Former Lehigh University student allegedly poisoned black roommate