Content warning: This story contains mentions of knife violence, suicide and death.

Former Feinberg School of Medicine Prof. Wyndham Lathem was sentenced to 53 years in prison Tuesday for the 2017 fatal stabbing of his boyfriend, 26-year-old hair stylist Trenton Cornell-Duranleau.

A Cook County jury found Lathem, 47, guilty of first-degree murder in October following a week of testimony.

NU fired Lathem in 2017 after he fled the Chicago area following the murder.

Lathem and Andrew Warren, who prosecutors said Lathem paid to come to Chicago as part of a pact to kill each other and Cornell-Duranleau, stabbed Cornell-Duranleau more than 70 times on July 27, 2017. According to prosecutors, the killing was part of a premeditated sexual fantasy of “killing others and then themselves.” Warren, who was an Oxford University financial officer at the time of the murder, testified that he agreed to kill Cornell-Duranleau at Lathem’s suggestion.

During his trial, Lathem testified that he hid in the bathroom while Warren stabbed Cornell-Duranleau during what began as a methamphetamine-fueled sexual encounter involving the three men.

However, Warren, who pleaded guilty in 2019 under a plea agreement that called for him to testify against Lathem, testified that he did stab Cornell-Duranleau, but only after Lathem had already begun stabbing him.

Under questioning from the prosecutor, Lathem said he did not try to stop Warren from stabbing his boyfriend and took a shower before the two fled together.

Lathem’s testimony also contradicted what he said in a video he emailed his parents days after the murder.

“He trusted me completely and felt safe with me, and I betrayed that,” Lathem said on the video, which was played twice at his trial. “I took that all away when I killed him.”

When sentencing Lathem, Cook County judge Charles Burns described the killing as “cold-blooded” and an “execution.”

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