A Jacksonville man was convicted Thursday of two murders that took place just hours apart the morning of July 20, 2008.

Billy Sheppard was found guilty of killing 39-year-old Patrick Stafford and 16-year-old Monquell Wimberly.

Stafford was shot to death in a robbery attempt in the 1600 block of Academy Street in Northwest Jacksonville.

Wimberly was killed in a drive-by shooting in the 100 block of King Street as part of a gang dispute.

Sheppard goes back to court next Friday for the penalty phase of his trial. Prosecutors are seeking the death penalty.

That day in 2008 became known as "Bloody Sunday." There was a third, unrelated killing later on that day, followed by an unrelated police-involved fatal shooting of a robbery suspect who had stolen a police cruiser.