Funeral arrangements were finalized Wednesday for the Zachary firefighter and reserve police officer killed Monday night in the line of duty.

The service for Deputy Fire Chief Christopher Lawton will be held at noon Saturday, March 17, at the Zachary United Methodist Church, 4205 Church St., Zachary officials announced Wednesday. There will be a procession to Clinton, where Lawton will be buried. 

Visitation will be held at the church from 5 p.m. to 8 p.m. Friday and before the service from 9 a.m. to noon Saturday. 

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Lawton, 41, died after he was hit by a U-Haul truck in the parking lot of the Baker Walmart. He and another unnamed Zachary police officer were working undercover to arrest the driver of the U-Haul who was wanted on aggravated battery, said Zachary Police Chief David McDavid. 

East Baton Rouge Coroner Dr. Beau Clark said Wednesday that an autopsy revealed Lawton died of blunt force injuries to his head and torso. 

"It is with great sadness and respect we investigate any unexpected or traumatic death," Clark said in releasing the autopsy results Wednesday afternoon. "When our investigation involves the death of a law enforcement officer, it is particularly tragic."

The driver, Albert Franklin, 33, was booked on first-degree murder and other counts, documents show. A woman who was with him in the U-Haul was booked on obstruction of justice. 

Lawton signed up with the Zachary fire department in March 1996 as a volunteer and then switched to full time in March 1998. He served as a deputy chief in recent years and did arson investigations.  

In 2008, he became a reserve police officer with the Zachary Police Department. He was fully certified and trained, but worked in the volunteer position part-time, McDavid said. 

Lawton leaves behind his wife of 19 years, Shannon, as well as son Marshall and daughter Claire.

Local officials and first responders paid tribute to Lawton in the days following his death, including the East Baton Rouge Metro Council, which held a moment of silence at their Wednesday meeting. Each council member wore a lapel ribbon in his honor. 

The Zachary City Council also held a moment of silence during their meeting Tuesday night.

Follow Lea Skene on Twitter, @lea_skene.