Lin Senhao, a medical student in Shanghai convicted of poisoning his roommate in 2013, was executed after the death sentence was upheld by the Supreme People's Court (SPC) on Friday.

The Shanghai No. 2 Intermediate People's Court, acting on the execution order signed by the SPC president, executed Lin, a former medical student at the prestigious Fudan University. Before the execution, Lin met with his family members with the court's permission.

Lin was sentenced to death by the Shanghai No. 2 Intermediate People's Court on Feb. 18, 2014. He was convicted of using N-Nitrosodimethylamine, a deadly chemical compound taken from a university lab, to poison his roommate, Huang Yang, which resulted in Huang's death.

On Jan. 8, the Shanghai Higher People's Court rejected Lin's appeal and upheld the death sentence after a second trial. The court reported Lin's case to the SPC for verification of case details and approval.

The SPC publicized the results of the verification in a statement issued Friday. According to the statement, Lin had a grudge against Huang and decided to inflict harm through poisoning.

On the afternoon of March 31, 2013, Lin borrowed the key to an imaging lab at Fudan University-affiliated Zhongshan Hospital and picked up the chemical and a syringe, the SPC said.

Later that day, Lin brought the lethal chemical back to his student dorm room and poured them into the water dispenser, according to the statement.

On the morning of April 1, Huang vomited after drinking from the dispenser and went to Zhongshan Hospital for treatment.

On the afternoon of April 2, Huang was shown to have impaired liver function and hospitalized. He was admitted to the intensive care unit due to his worsening condition on April 3.

Lin, on the other hand, did not confess, even when questioned by the police, until April 12, when the police interrogated him after confirming suspicions.

Huang died on April 16 of acute liver failure due to N-Nitrosodimethylamine poisoning followed by multiple organ failure, according to forensic analysis.