High Quality Content by WIKIPEDIA articles! Two shootings of Oakland, California police officers took place on Saturday, March 21, 2009, when four officers were killed by a convicted felon wanted on a no-bail warrant for a parole violation. The convicted felon, Lovelle Mixon, initially shot and killed two Oakland police officers during a traffic stop, then killed two more when SWAT team officers attempted to apprehend him two hours later. Mixon staged an ambush of the SWAT officers from his hiding place and was killed in a barrage of gunfire as the officers returned fire in self-defense.