DETROIT — A man charged in the 2016 shooting death of a Detroit police officer has pleaded no contest but mentally ill to second-degree murder and other charges.

Under a plea agreement, 22-year-old Marquise Cromer also entered the plea Thursday to charges of assault with intent to murder and carjacking and to firearms violations. He’ll serve 38-75 years in prison on the murder charge and an additional 20-30 years for carjacking, with additional time for the firearms violations.

Cromer shot Sgt. Kenneth Steil in the shoulder with a sawed-off shotgun in September 2016 while police pursued him for a carjacking and shooting his father. Steil died of a blood clot five days later.

During his arraignment, Cromer was caught on video laughing and giving a thumbs-up sign.

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