By CBSLA Staff

SAN DIEGO (CBSLA) — The San Diego County Sheriff’s Department released body camera footage and infrared aerial videos Thursday of a fatal shooting involving a DUI suspect on Oct. 4 following a pursuit that stretched across multiple counties.

Infrared aerial footage of the fatal shooting (San Diego Sheriff’s Dept.)

The pursuit began in the early hours of the morning when Santa Ana police attempted to stop 30-year-old Christopher Ulmer for a suspected DUI.

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Ulmer drove away and police, alongside California Highway Patrol, chased him from Orange County to Chula Vista. Ulmer briefly stopped on the 805 freeway near the Mexican border, which is when authorities used a PIT maneuver to end the pursuit, officials said.

The Whittier man then got out of his car and pointed a metal object, which they believed to be a gun. Officers then opened fire.

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Upon further investigation, the object was not a gun. Rather, it was this object pictured above. (San Diego Sheriff’s Dept)

Upon further investigation, the object was not a gun.

Ulmer was transported to the hospital, where he was pronounced dead.

The FBI will be monitoring the investigation.

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(This post has been updated to correct an earlier version that stated San Diego County Sheriff’s deputies were involved in the shooting.)