Published: Jul 22, 2010 11:14 PM EDT
Updated: Jul 22, 2010 8:15 PM EDT

TAMPA, Fla. -Dantae Morris pleaded not guilty to killing two cops and two civilians.

Dantae Morris was arraigned Thursday morning on four murder charges. He is accused of killing Officer Dave Curtis and Officer Jeff Kocab as well as Derek Anderson and Harold Wright.

In June, Officer Dave Curtis and Officer Jeff Kocab were shot and killed during a routine traffic stop on East 50th Street in Tampa.  After a four-day manhunt, Morris turned himself in to police on July 2.

Hillsborough County prosecutors will seek the death penalty for the two murdered police officers, but not for the other two murders Morris is charged with.

The FBI is offering a $20,000 reward  for information leading to the recovery of the handgun used to kill the two police officers and a third victim. Agents are asking anyone with information about the weapon to contact the Tampa FBI office. (813) 253-1000