Metro

Dorchester man is charged in death of woman shot while sitting in car

More than a year after 25-year-old Keosha Gilmore was shot and killed while sitting in a car on a Mattapan street, police arrested a suspect from Dorchester on Friday.

Authorities are crediting the arrest of Christopher Jackson, 26, to interviews and new information, along with a recent story from Fox 25 News, said Boston police.

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Jackson was arrested without incident and is charged with murder, unlawful possession of a firearm, and unlawful possession of ammunition, police said.

He is expected to be arraigned in Dorchester District Court on Monday, said Jake Wark, a spokesman for the Suffolk district attorney.

On Feb. 19, 2012, police were called to 26 Alabama St. around 9 p.m. for a person shot. Gilmore was found inside a car suffering from a gunshot wound. She was taken to Brigham and Women’s Hospital and later died of her injuries.

The connection between the Alabama Street address and Gilmore was unclear Friday night, and members of Gilmore’s family could not be reached for comment.

Wark said investigators believe the assailant and victim knew each other. Authorities have not released details on a motive in the slaying.

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The homicide unit is still investigating the shooting and is encouraging anyone with information to contact detectives at 617-343-4470.

Derek J. Anderson can be reached at derek.anderson@globe.com.