SHERMAN, TX ― Death Row inmate Lester Bower convicted of killing four people in Sherman 25 years ago is now back in state prison after spending the weekend in the Grayson County Jail.

Bower was transferred to Grayson County on Friday night to undergo DNA testing as part of an appeal. Grayson County prosecutors expect those DNA results within the next few months.

They say Bower's attorney asked for the DNA testing because he claims the crime was committed by someone else, and the presence of that person's DNA could exonerate Bower.

Bower was convicted of shooting and killing Denison building contractor Bob Tate, former Sherman policeman Ronald Mayes, Grayson County Sheriff's deputy Philip Good, and interior designer Jerry Mac Brown of Sherman.

Those bodies were found in an airplane hangar near Sherman back in October 1983.

Prosecutors say Bower killed Tate to steal an ultra-light that was for sale and killed the other three when they unexpectedly showed up.

Bower has been on death row since 1984, and there have been at least five previous attempts to execute him, but those were blocked by the courts.