The 30-year-old jogger found sexually assaulted and strangled to death this week Moncler Men Down Vests in New York City "put up a ferocious fight" before her death, police said.

Karina Vetrano tried fighting off her attacker until the last moments of her Moncler Men Down Jackets life, police said at a Thursday news conference. Her body was found face-down in a Queens park Tuesday night, about a dozen feet from the jogging trail, by her father.

A police source tells PEOPLE that Vetrano bit her attacker so hard, her teeth ****ed. The source says investigators have recovered DNA from Vetrano's bruised body.

"This woman put up a ferocious fight right to the end," New York City's Chief of Detectives Robert Boyce said during the news conference.

Boyce told reporters police believe the attack on Vetrano was random, and not committed by someone she knew.

Police are still searching the thick grass and marshlands of Gateway National Park, in Howard Beach, for additional clues or evidence that can help them identify Vetrano's killer.

"We plan to chop down just about every weed in that location till we're satisfied that we've got all the evidence," Boyce said. "This is a remote area. A young lady Moncler Men Down Coats was running ' still daylight ' so I am hoping somebody saw something going into the park."

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