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THE DEPARTMENT RELEASED A STATEMENT TONIGHT SAYING FIRST AND FOREMOST, THEIR THOUGHT’S AND PRAYERS ARE WITH THE FAMILY OF THE YOUNG WOMAN WHO DIED IN THIS CRASH. FRIDAY NIGHT--SIERRA CROTEAU WAS ON HER WAY HOME AFTER VISITING WITH FAMILY IN MILFORD. SHE LIVED IN MANCHESTER WITH HER BOYFRIEND TYLER MATTEAU AND HIS MOTHER- KRISTINE. CLIP:8444 :07;52- :07;55 "ABOUT 11, 11:30 SHE WAS ON HER WAY HOME." AFTER ABOUT AN HOUR SIERRA WASN’T HOME. CLIP:8444 :08;01- :08;11 "MY SON ACTUALLY TEXTED HER AT MIDNIGHT. AND THEN HE DID ANOTHER ONE AT 2:30. BABE, ARE YOU OKAY? WHERE ARE YOU? AND SHE NEVER RESPONDS." AN EARLY- MORNING KNOCK AT THE DOOR BY STATE POLICE BROUGHT THEM THEIR ANSWER...ONE THEY NEVER EXPECTED TO HEAR. SIERRA DIED AFTER A PICKUP TRUCK CRASHED INTO HER VEHICLE ON ROUTE 101 IN AMHERST. CLIP:8444 :08;49-:8;51 "MY SON’S BROKEN, YOU KNOW." BEHIND THE WHEEL OF THE PICKUP WAS OFF- DUTY LONDONDERRY POLICE OFFICER TYLER BERRY. STATE POLICE SAY THE 27-YEAR-OLD’S VEHICLE CROSSED THE CENTER LINE, SLAMMING HEAD-ON INTO SIERRA’S CAR. CLIP:8444 :08;51- :08;59 "AND IT’S SAD TO HEAR THAT A COP HAD ACTUALLY DONE THIS. THAT MAKES IT MORE DEVASTATING." BERRY WAS TAKEN TO CATHOLIC MEDICAL CENTER IN MANCHESTER WITH SERIOUS INJURIES. HE WAS ARRESTED AT THE HOSPITAL AND CHARGED WITH AGGRAVATED DRIVING UNDER THE INFLUENCE OF ALCOHOL. MEANWHILE--KRISTI NE IS NOW TRYING TO HELP HER SON COPE WITH THE LOSS OF HIS GIRLFRIEND. SIERRA WORKED AS A LICENSED NURSING ASSISTANT. KRISTINE SAYS GIVING BACK WAS IN HER DNA. CLIP:8444 :08;38- :08;41 "SHE;S JUST ONE OF THOSE SWEET GIRLS THAT WOULD DO ANYTHING FOR ANYBODY.’ KRISTINE SAYS HER SON AND SIERRA HAD HIGH HOPES FOR THE FUTURE. CLIP:8444 :09;06- :09;11 "THEY WERE GOING TO GET THEIR OWN PLACE IN THE NEXT FEW MONTHS. THEY WERE SAVING UP. THEY WERE GOING TO START A LIFE." THE LONDONDERRY POLICE SAY THEY WILL COOPERATE FULLY WITH THE INVESTIGATION AND TAKE APPROPRIATE ACTION WHEN MORE FACTS ARE KNOWN. RIGHT NOW IT’S UNCLEAR IF BERRY WILL FACE ANY ADDITIONAL CHARGES. LIVE IN LONDONDERRY TIM CALLERY WMUR NEWS NINE.

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A suspected drunken driver involved in a fatal head-on collision on Route 101 on Friday night is a Londonderry police officer.Londonderry police Detective Christopher Olson confirmed to WMUR that Tyler Berry, 27, is a member of the department. Berry was not on duty at the time of the crash. State police say Berry, of Amherst, was driving a pickup west on Route 101 in Amherst about 11:30 p.m. when he crossed the center line, hitting 21-year-old Sierra Croteau's SUV head-on as she was driving east.Croteau, of Manchester, was pronounced dead at the scene. Loved ones say she was on her way home after visiting with family in Milford when the crash happened.She lived in Manchester with her boyfriend Tyler Matteau and his mother Kristine Matteau. After about an hour, when Croteau hadn't come home, Kristine and Tyler were left wondering where she was. "My son actually texted her at midnight and then he did another one at 2:30 (saying) 'babe, are you okay? where are you?' and she never responds," Matteau said.An early-morning knock at the door by state police brought them their answer, one they never expected to hear. "My son's broken," Matteau said.Berry was taken to the hospital with serious injuries. Police arrested Berry at the hospital and charged him with felony aggravated driving under the influence of alcohol. A booking photo of Berry has not been released. "It's sad to hear that a cop had actually done this. That makes it more devastating," Matteau said.In a statement, Olson said the Londonderry Police Department will "cooperate fully with the investigation and take appropriate action when more facts are known."Berry has been a patrol officer in Londonderry for a little more than a year. Meantime the Matteau's mourn the loss of a woman who they say was generous and giving. She worked as a licensed nursing assistant. "She's just one of those sweet girls that would do anything for anybody," Matteau said.She said her son and Croteau had high hopes for the future."They were going to get their own place in the next few months, they were saving up, they were going to start a life."