Sergeant Arthur Cashin

Sergeant Arthur Cashin

Chelsea Police Department, Massachusetts

End of Watch Sunday, July 20, 1980

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Arthur Cashin

Sergeant Arthur Cashin was shot and killed while making a traffic stop.

After stopping a vehicle for going the wrong way on a one-way street in Bellingham Square, Chelsea, Sergeant Cashin approached the driver's side of the vehicle as his partner, Officer William Copello, approached the passenger side. The driver got out of the vehicle and immediately punched Sergeant Cashin, who landed face-first on the sidewalk. The driver then un-holstered Sergeant Cashin's service weapon and shot the officer twice in the back as he lay on the ground. Officer Copello then drew his service weapon, shooting and killing the driver.

Sergeant Cashin was pronounced dead shortly after midnight on July 20th at Massachusetts General Hospital in Boston.

Sergeant Cashin had served with the Chelsea Police Department for nine years. He was survived by his wife and two young daughters.

His nephew, Captain Rick Cashin, was killed in an on-duty automobile accident while serving with the Massachusetts State Police on January 28, 2009.


  • Age 37
  • Tour 9 years
  • Badge Not available

Incident Details

  • Cause Gunfire
  • Incident Date Saturday, July 19, 1980
  • Weapon Gun; Unknown type
  • Offender Shot and killed

traffic stop

Most Recent Reflection

View all 17 Reflections

I was there that horrific night. I watched as you were moving around on the ground, with holes in the back of your shirt and blood coming out. I saw your partner console you as you waited for the ambulance. I saw the guy who murdered you laid out with bullet holes in his chest. I remember the alarm across the street going off due to a ricochet bullet that set Allen's cut rate alarm off. I used to walk buy the jewelry store where it happened and many times seen the dent where the bullet went through the man who murdered you and hit the slide down safety door frame and went into Allen's cut rate across the street. It always freshens the memory of what happened that night. I remember you taking time to talk to me when I was out and about late at night as you walked the beat. Your murder should never have happened if there were Spanish speaking policemen on the force back then, but that all changed since you were killed. I'm sorry you had to go out of this life the way you did.
You were one of the nicest Police man I have ever met. I will never forget you or what happened to you. I have been to were you rest and prayed for you and yours. Some day we will meet again and chit chat like we have done before.

no rank / anonymous
a friend

November 30, 2022

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