LINCOLN, Nebraska—One of two men convicted in the 1993 murders that spawned the movie “Boys Don’t Cry” now says he was the only attacker who shot and stabbed a transgendered person and two other victims.

The man Nissen once blamed for the killings, John Lotter, is now on death row and has asked for a new trial.

Teena Brandon was born a female but for a time lived as a man in rural southeast Nebraska and dated a female friend of the two men. Prosecutors said the 21-year-old was killed in a farmhouse near Humboldt after reporting being raped by Lotter and Nissen. During the trial, Nissen said he had stabbed Brandon but that Lotter fired all the shots that killed Brandon and the others.

Lotter has maintained since his arrest that he is innocent.

Nissen, who is serving a life sentence, made the admission in a sworn affidavit now being used in Lotter’s motion.