New Canaan police say they have found a link between the victims in the spate of animal beheadings.

Police also revealed a previously unreported case, which occurred Oct. 9, when a New Canaan High School senior found a dead bird in the back of her car. The girl had left school and driven to Waveny Park, and when she got out of her car, noticed the dead bird. The car's doors may have been unlocked, but the windows were closed, so there is no chance the bird flew in the car. Police believe the bird was placed there.

Each dead animal or animal head turned up at the house or car of a different senior girl at New Canaan High School, and all three girls are friends with each other, according to police.

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Police Sgt. Carol Ogrinc said the police had surveillance footage of the incident involving the decapitated bird on Autumn Lane, but are not able to identify anyone in the video. She said the only thing visible is that a car came to the house with its lights illuminated at 9:30 p.m. Oct. 16 and drove away shortly thereafter. The footage was taken by the resident's security camera.

"We believe there's a common thread there that at least helps us look at who (the girls) were dealing with recently, if they had any disputes with anyone, if they had any reason to be targeted like that," Ogrinc said.

In an incident police believe to be unrelated to the others, a fourth decapitated animal was reported to police Oct. 26.

Laurel Road resident Roy Abramowitz reported finding a small, brown decapitated bird on the deck of his house at 8 a.m. Abramowitz told the police he'd been out of the house between 6:30 and 10:30 p.m. the night before and had not seen the bird at that time, police said. Police also said Abramowitz's dogs did not bark during the night.

"After thinking about this for 24 hours, my theory is either this incident is related to the other two or a copy cat directly targeting me to get me out of the race," he said. Abramowitz is running as a petitioning candidate for Town Council Nov. 5. He noted previous attacks on him before elections, such as a negative letter in the newspaper from former First Selectman Jeb Walker two years ago, and a string of emails questioning his accounting credentials the afternoon of the Jan. 10 Town Council special election.

"They had to walk 300 feet up my driveway and needed to know we sleep on the other end of the house," he added.

Police said they do not believe the bird found on Abramowitz's property is related to the other incidents, which include a cat's head found Oct. 14 on Laurel Road and a decapitated bird found Oct. 16 on Autumn Lane, but said the way it was decapitated indicates it was done by a human. Abramowitz does have a daughter, but she is younger than the other three girls, and is not in their circle of friends.

"I'd like to think it won't continue because it is disturbing. We're not ruling out that it's Halloween, but given that it started early in October, I tend to think it wasn't," Ogrinc said.

twoods@bcnnew.com; 203-330-6582; @Woods_NCNews