A former resident of a Bronx homeless shelter returned there Monday night, abducted its director, forced her to undress in her car, chased her as she tried to flee and then shot her in the street, killing her, police officials said on Tuesday.

Witnesses told detectives that the victim, Ana Charle, 36, ran naked in the street from the suspect, West Spruill, 39, who was also naked as he chased her and opened fire.

“They hear nothing but the shots,” a police official, who spoke on the condition of anonymity to discuss a continuing investigation, said of the accounts provided by witnesses, several of whom had dialed 911.

“It is fairly close range,” the official said. “This is as bad a homicide as I’ve seen.”

As Ms. Charle, of Queens, fell to the sidewalk on Bullard Avenue, near East 237th Street, the gunman returned to her car, put his clothes back on and walked away, clutching two bags, police officials said, citing the witnesses’ accounts.