Jesse Lee Adolph, 32, dies in crash into Musselshell River on July 10.

The Roundup man who was killed when the vehicle he was traveling in plunged into the Musselshell River early Thursday has been identified as 32-year-old Jesse Lee Adolph, 32.

The cause of death is not yet known, said Sheriff Woodrow Weitzeil. An autopsy is scheduled for Saturday.

Adolph and two other men were headed northbound in a small SUV when the 21-year-old driver failed to negotiate a sharp turn on Parrot Creek Road, said Montana Highway Patrol Trooper Matt Christensen.

As he rounded the turn, he went off the east side of the bridge which is located just beyond the turn.

The driver and his passenger, a Roundup man, 24, were able to get out of the vehicle. Adolph, was unable to free himself.

He was brought to shore by Musselshell County Sheriff’s Deputy Nikolas Lassila and Chief Deputy Scott Johnson, who arrived on-scene moments after the crash, jumped into the river and swam to the vehicle, said Musselshell County Undersheriff Aaron Edwards.

The officers performed CPR on Adolph but were unable to resuscitate him. He was pronounced dead at Roundup Memorial.