A 46-year-old man was fatally shot early Saturday after he fled from an attempted traffic stop in Slidell and then fired on police during a lengthy chase that twice crossed Lake Pontchartrain, according to St. Tammany Parish Sheriff Jack Strain.

Law enforcement officers from several agencies were involved in the chase and the shooting that left the man dead.

The man was later identified by a Coroner’s Office spokesman as Lucien Rolland, of Slidell.

A public records search showed misdemeanor convictions for Rolland in Utah, and he was scheduled to stand trial in St. Tammany later this year for a second-offense DWI.

An autopsy has been scheduled for Monday, the spokesman said.

Authorities said a second man who was a passenger in Rolland’s white pickup jumped out of the vehicle in the early part of the chase, near Rat’s Nest Road in Slidell.

Later Saturday morning, detectives arrested a man they said they believe was the passenger. His name was not released.

According to Strain, the incident began about 2:30 a.m. when one of his deputies saw the truck driving slowly in the middle lane of Pontchartrain Drive in Slidell and tried to stop it. After the deputy turned on his lights and siren, the truck took off, heading for the U.S. 11 bridge over Lake Pontchartrain.

Around Rat’s Nest Road, the passenger jumped out of the truck and fled. Deputies continued to chase the pickup as Rolland made for the south shore.

New Orleans police joined in the chase after the truck crossed the bridge. The truck exited U.S. 11 in Orleans Parish, got on Interstate 10 and headed back toward Slidell. At some point during the chase, the driver fired upon officers “multiple times,” Strain said.

Near the Old Spanish Trail exit in Slidell, State Police had deployed tire-deflation devices, which caused at least one of the truck’s tires to blow out, Strain said. However, Rolland kept going, finally stopping at the Gause Boulevard exit.

There, he left the vehicle, apparently not realizing he had failed to put it in park. The truck kept moving, and he returned to put it in park. When he got out of it again, Strain said, he was brandishing a semi-automatic handgun, believed to be the same weapon he had fired during the chase.

At that point, officers from three agencies — the St. Tammany Sheriff’s Office, Slidell Police Department and State Police — opened fire on Rolland. He died at the scene.

It was unclear how many rounds were fired, but many bullet holes were visible in the truck’s tailgate.

The Sheriff’s Office said more information will be released Monday.

Follow Faimon A. Roberts III on Twitter, @faimon.