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A Florida man convicted of killing his cellmate with a pen smiled and laughed as a judge sentenced him to life in prison Tuesday.

Marcus Terry, 43, was found guilty of second-degree murder in December 2025 for killing his cellmate inside the Dade Correctional Institution in Homestead in 2021 by stabbing him in the head with a pen, according to NBC Miami.

During a court appearance on Tuesday, Terry's lawyer, Steven Yermish, asked Judge Ellen Sue Venzer to grant his client a new trial, arguing that inadmissible evidence was presented at trial at the end of last year, the outlet reported.

GUARDS AT 'ALLIGATOR ALCATRAZ' BEAT, PEPPER-SPRAYED DETAINEES, LAWYER SAYS

Marcus Terry, 43, smiled and laughed as a judge sentenced him to life in prison without parole.…