One suspect was charged and a second was being sought in the killing of a Philadelphia police officer who was shot with an assault rifle while investigating a report of bank robbery, police said.
Levon Warner, 38, was charged with murder, robbery, conspiracy and related offenses, Deputy Commissioner William Blackburn said.
A second man, Eric Floyd, 33, believed to have escaped from a halfway house in Berks County, was being sought on a homicide charge. A third man, Howard Cain, 33, was killed by police.
Sgt. Stephen Liczbinski, slain Saturday, was a 12-year veteran who would have turned 40 on Tuesday.