By CBS3 Staff

PHILADELPHIA (CBS) — Family, friends remember Christine Lugo Sunday afternoon as police desperately try to find her killer. Lugo was killed during a robbery at a Dunkin’ in North Philadelphia.

A memorial continues to grow for the store manager at the Dunkin’ Donuts on West Lehigh Avenue. A vigil was held to remember the mother of two on Sunday afternoon.

READ MORE: Crash Involving SEPTA Bus, 4 Vehicles In Philadelphia's Cobbs Creek Neighborhood

Surveillance video released by Philadelphia police shows a gunman, armed with a revolver, approaching a Dunkin’ manager as she was opening her North Philadelphia store just after 5 a.m. Saturday.

READ MORE: Woman Facing Arson Charges After Allegedly Intentionally Setting Fire At Howard Johnson Hotel In Blackwood

Police are asking for the public’s help identifying the suspect. The gunman was wearing a blue, zip-up hooded sweatshirt with blue gloves and a blue mask.

MORE NEWS: Taste With Tori: Wake Coffee Roasters' Unique Way Of Selling Coffee Makes All Extra Happy In Morning

Anyone who recognizes the suspect is urged to contact the police.