The manhunt continues for Timothy V. Jorden, a former Army Special Forces surgeon who is believed to be responsible for a fatal shooting at a Buffalo, N.Y., hospital on Wednesday.

Jorden, 49, is wanted for allegedly shooting and killing Jackie Wisniewski, 33, a receptionist identified as his one-time lover.

Local authorities obtained a warrant to search Jorden's Lakeview, N.Y., home late Wednesday night, as part of a joint effort between the Hamburg Police Department and the Erie County Sheriff's Department. Jorden's home is in the jurisdiction of the Hamburg Police Department; the sheriff's department provided a special robot to search the home, according to ABC News.

Police did not comment on a possible motive for the shooting, which occurred at the Erie County Medical Center. Witnesses said they heard four shots fired at the David K. Miller Building on the medical center campus around 8:15 a.m.

Initially reports said two separate shootings had taken place, one after the other; however, police later confirmed only one shooting occurred, leaving a female victim dead from a gunshot wound.

Wisniewski was found dead in a covered passageway joining the hospital's Kidney Center and another wing of the medical center, The Miller Building, ABC News reported.

The hospital campus went into lockdown shortly after the shooting.

Buffalo police, backed up by a New York State Police SWAT team, swarmed the grounds, fanning out to search for the shooter, who fled the scene. The campus lockdown was lifted at noon, and police officially described Jorden as a person of interest.

Officials said Jorden was a decorated career soldier who graduated from the University Of Buffalo School Of Medicine in 1996, but according to officials, he had experienced emotional difficulties recently.

Jorden's ex-wife, Francisca Wellsbury, told ABC News she was shocked by the news that her ex-husband had become a suspect in a murder.

We've lived separate lives for a long time, Wellsbury, who lives on the West Coast, said. I'm just as shocked as anyone. It's traumatic.

She declined to go into further detail, but said: This is not the person I knew. I wish he would seek help.

Jorden's military career spanned 18 years with two periods of service, earning him numerous medals and commendations, including the Army Achievement Medal, Army Commendation Medal, Meritorious Service Medal and Master Parachute Badge Scuba Diver Badge Special Forces Tab.