Updated

A person familiar with the investigation says a 33-year-old receptionist at a Buffalo hospital was the victim of a fatal shooting.

The person, who spoke on condition of anonymity because the investigation is continuing, said the victim was Jacqueline Wisniewski. She had a young son.

Police are searching for a trauma surgeon as a "person of interest" in connection with Wisniewski's death. She was shot four times just after 8 a.m. Wednesday in a stairwell at a building on the Erie County Medical Center.

The surgeon, 49-year-old Timothy Jorden, is a former U.S. Army Special Forces weapons expert. Police, including SWAT units, have converged on his suburban home and say he may be armed and dangerous.