LOWELL -- Investigators are asking the public to help identify a person of interest in the shooting deaths of two Lowell brothers who were gunned down at a home on Andrews Street early Sunday morning.
Brothers Keith Callahan, 35, and Joseph Callahan, 29, were both shot during an incident at 105 Andrews St., where police were called about 2:30 a.m., for what was initially a request for medical assistance, according to the Middlesex County District Attorney's Office.
Police arrived to find Keith Callahan dead from gunshot wounds and Joseph Callahan suffering from gunshot wounds that would claim his life after he was taken to Lowell General Hospital, according to the DA's office.
Both men are the sons of retired Lowell police Sgt. Richard Callahan, a decorated officer who left the department just a few years ago.
No arrests were made Sunday, but the DA's office released a sketch and description of a person of interest with whom police would like to speak. That person is described as a light-skinned Asian male, 25 to 35 years old, about 5 feet 6 inches, with a thin build, a mustache, a goatee that hangs about an inch below his chin, and dark hair worn in a ponytail.
The man was last seen wearing a white T-shirt and jeans.
The shooting occurred at a two-family home at the corner of Andrews and Otis streets in the South Lowell section of the city.
Neighbors interviewed Sunday said they didn't hear or see the shooting and didn't know the victims.
Family members requested privacy Sunday.
Betsy Motard, who said she was a longtime friend of Keith Callahan, described him as an awesome father and great friend who would give you the shirt off his back. She said Callahan was a father, but declined to speak about his children publicly in order to protect their privacy.
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"He was fun-loving, and he always wanted to make sure everyone was having a good time," Motard said. "He was very outgoing."
Jerry Flynn, a retired Lowell police officer who now works as executive director of the New England Police Benevolent Association, described Richard Callahan, the brother's father, as a great guy.
"You couldn't ask for a nicer guy," Flynn said. "He'd do anything for anybody."
The slaying comes less than a week after police announced a significant 23 percent drop in "quality of life" crimes in Lowell. Those crimes, such as robbery, burglary and aggravated assault, do not include homicide because there aren't enough homicides in Lowell to be statistically significant.
The killings are the second and third in Lowell this year. James Sheedy, 53, is facing a charge of murder in connection with the stabbing death on May 31 of 54-year-old Barbara Romano inside 255 Walker St.
The incident is being investigated by Lowell and state police, along with the DA's office.
City property records show the building where the shooting took place is owned by Joanne and Evangelos Giannopoulos of Dracut. They did not return a call seeking comment.
Anyone with information is asked to call Lowell police at 978-937-3200, state police attached to the District Attorney's Office at 781-897-6600, or Crimestoppers at 978-459-TIPS (8477). Tipsters can remain anonymous, but can receive up to $1,000 for information leading to an arrest.
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