New details have emerged in a golf cart crash that killed the friend and longtime agent of former Denver Broncos quarterback John Elway.

Jeff Sperbeck, 62, died last week after he fell from a golf cart that was reportedly being driven by Elway. A new report from Denver’s NBC affiliate 9News puts together a timeline of the tragic events, and sources told the station that Elway was not impaired when he was driving.

On April 26, Sperbeck and Elway were in La Quinta, California, with a group of approximately 10 to 15 family members and friends.

After leaving an event at The Madison Club, the group took three or four golf carts to make the trip to Elway’s house, which was “a short ride of no more than a quarter mile,” according to the 9News report.

Elway was reportedly driving a single-bench cart behind the other carts with his girlfriend and Sperbeck’s wife seated next to him. Sperbeck had decided to sit in the back of the cart so his wife could sit in the front, sources told the network.

Sources told 9News that no one was drunk, and it had been a smooth ride until Sperbeck fell back and immediately hit his head. Elway called 911, according to the report.

Sperbeck died four days later from his head injury after being taken off life support.

Sperbeck and Elway worked together starting in the ’90s, with Elway and the Broncos winning the Super Bowl in 1998 and 1999.

Following his football career, Sperbeck and Elway remained friends and formed a wine company together in 2013 called 7Cellars.

In a statement last week, Elway said he was “absolutely devastated and heartbroken” over the loss of his friend.

“There are no words to truly express the profound sadness I feel with the sudden loss of someone who has meant so much to me,” Elway added.

In a statement on Friday, the Riverside County Sheriff’s Office said the investigation is “ongoing” but added that “there is nothing to indicate that this is anything more than a tragic accident.”