A New Haven police officer was arrested in connection with a suspected DUI after the vehicle was involved in a car crash that killed a fellow officer.

Officers Robert Ferraro, Joshua Castellano, John Truhart, a 32-year-old man from Bethel and two women from Texas were traveling down a road in Las Vegas around 4 a.m. at a high speed, Las Vegas police said.

Evidence from the scene, witness statements and videos showed the vehicle, a white Rolls Royce, lost control and crashed into another vehicle that was in a private driveway waiting to enter the street, according to the police report.

“The Rolls Royce exited the roadway to the right, colliding with [a] Ford Mustang,” the police report said. “The Rolls Royce continued westbound ... and collided with roadside utility poles, landscaping and a fire hydrant. The Rolls Royce overturned onto its roof, ejected the right front passenger from the vehicle and up righted itself before coming to rest.”

The ejected passenger was Castellano, who was a seven-year veteran of the New Haven Police Department and a member of the Shooting Task Force. First responders brought Castellano to a local hospital, but he succumbed to his injuries.

Ferraro, who was driving the vehicle with all of the officers, “showed signs of impairment,” Las Vegas police said.

“The driver was subsequently arrested for applicable charges,” they added.

New Haven Mayor Justin Elicker offered his condolences in a written statement Friday afternoon.

“My thoughts and condolences are with the family of Officer Castellano as well as his friends and colleagues at the New Haven Police Department,” Elicker said. “Officer Castellano served our community for seven years. We’re thankful for Officer Castellano’s service; he will be greatly missed.”