Update on New York's therapist slaying

NEW YORK (AP) -- Police combed through surveillance video, tested blood for DNA, took fingerprints and went door-to-door Thursday as they tried to find the man who hacked a psychologist to death in her office with a meat cleaver.

Among the unanswered questions: Did the balding, middle-age suspect know his way around the building? Was he a patient? And where did he go after the killing?

CNN affiliate WABC in New York is reporting that a suspect is being questioned in Pennsylvania.

Police released a detailed sketch and grainy surveillance footage of him entering and leaving the Upper East Side building where Kathryn Faughey was killed Tuesday evening.

Faughey's office was in shambles, with furniture overturned, shades torn and blood sprayed on the walls and pooled on the floor.

The suspect left behind a roller suitcase filled with adult diapers and women's clothing -- including blouses and slippers -- and a smaller second bag containing knives, rope and duct tape that were not apparently used in the attack, police said.

The killing shocked the mental health care community and raised questions about safety protections at therapists' offices. It also rattled residents of the affluent Manhattan neighborhood around Faughey's office.

"Everyone in the building is very nervous, because we know that this person is loose. It's very frightening," said Linda Elliott, who lives in the East 79th Street building where the attack occurred. It is in a bustling neighborhood just blocks from a major hospital complex.

Carrying the two bags and dressed in a three-quarter-length green coat, knit cap and gloves, the attacker breezed past the building's doorman, saying he had an appointment with Dr. Kent Shinbach, a 70-year-old geriatric psychiatrist who worked in the same office suite as Faughey, according to police.

Shinbach had office hours into the evening, police said, but it wasn't clear whether Shinbach or Faughey was the intended target.

The man walked into the suite's waiting room, where a female patient was waiting to see Shinbach, and at some point went into Faughey's office and attacked her, police said. Shinbach heard Faughey's screams and ran to help.

The attacker apparently didn't recognize Shinbach when he opened the door and said "she's dead," referring to Faughey, police said. He then attacked the psychiatrist, stabbing at Shinbach and pinning him to the wall with a chair before stealing $90 and escaping through a basement door, according to police.

Shinbach screamed out to the street from Faughey's office for help, and the building doorman called 911 around 9 p.m. By then, the attacker had escaped.

Shinbach had slash wounds on his head, face and hands. Police, believing the killer may have been injured in the attack, issued alerts to area hospitals.

Police have said the suspect may have been familiar with the building because his exit route through the basement wasn't very obvious. Surveillance tapes show him deliberately leaving the luggage by the basement door before walking out.