Published: Aug 25, 2010 3:54 PM EDT
Updated: Aug 25, 2010 12:54 PM EDT

MIAMI (AP) - A Miami man has pleaded guilty to killing his girlfriend in 1997 before she could testify against a notorious gang leader.

As part of a plea deal, 47-year-old Chazre Davis pleaded guilty Monday to second-degree murder and conspiracy to commit first-degree murder in the slaying of 29-year-old Cynthia Brown. He was sentenced to 40 years for the first charge and 30 for second, but the sentences will run concurrently. Prosecutors had been seeking the death penalty.

Brown was scheduled to testify against John Does gang leader Corey Smith, who was on trial for murder. But Davis was paid $20,000 to kill her.

That case against Smith was dropped but he was eventually sentenced to death in 2005 for the murder of Brown and three others.