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LOWELL -- Investigators late Sunday night released a sketch of a 25- to 35-year-old man who is described as a person of interest in connection with the shooting deaths of brothers Keith and Joseph Callahan.

Keith Callahan, 35, and Joseph Callahan, 29, are sons of retired Lowell police Sgt. Richard Callahan.

Police have been investigating the deaths since Sunday about 2:30 a.m., when officers were called to 105 Andrews St., for what was initially a call requesting medical assistance.

Officers arrived to find Keith Callahan already dead from gunshot wounds, and Joseph Callahan suffering from a gunshot wound that would claim his life after he was taken to Lowell General Hospital.

Police initially released little further information, but Sunday night prosecutors released a sketch of a man described as a light-skinned Asian male, 25 to 35 years-old, about 5 feet 6 inches tall, with a thin build.

The individual being sought wore his hair in a ponytail and had a mustache and a goatee that falls about a half inch below his chin, according to prosecutors. He was last seen wearing a white T-shirt and jeans.

Anyone who believes they may know this man's identity is asked to call Lowell police at 978-937-3200 or Crimestoppers at 978-459-TIPS (8477). Tipsters can remain anonymous, but can receive up to $1,000 for information leading to an arrest.


Anyone with information can also call state police detectives assigned to the office of District Attorney Marian Ryan by calling 781-897-6600.

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