The person accused in a fatal shooting and fire Sunday at a Church of Jesus Christ of Latter-day Saints in Grand Blanc Township, Michigan, is a 40-year-old area man with a military background.

Thomas Jacob Sanford, 40, is from Burton, a city of nearly 30,000 people roughly 6 miles from Grand Blanc Township. Both are suburbs of Flint.

Police said the attacker rammed the church with a vehicle, got out and opened fire with an assault rifle. Grand Blanc Township Police Chief William Renye said he also used an accelerant to start a fire, which was later contained.

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At least four people were killed in the attack, two of whom were shot, and eight were injured.

Officers killed Sanford in a parking lot behind the church, police said.

The FBI’s special agent in charge for Michigan, Reuben Coleman, said Sunday night that the bureau is looking for a motive.

“The FBI is now leading the investigation and is investigating this as an act of targeted violence,” he said.

Sanford joined the Marine Corps in 2004, according to Marine records, and held the titles of organizational automotive mechanic and vehicle recovery operator.

In 2007, he started a nearly seven-month deployment under Operation Iraqi Freedom and left the corps a few months later, the records show.

Sanford achieved the rank of sergeant and had his last duty assignment at Camp Lejeune in North Carolina before he left the Marines in June 2008, according to the records.

He was awarded the Marine Corps Good Conduct Medal, the Sea Service Deployment Ribbon, the Iraq Campaign Medal, the Global War on Terrorism Service Medal and the National Defense Service Medal, the records show.

A 2007 article in the Clarkston News, a publication in the village of Clarkston, about 20 miles southeast of Grand Blanc Township, said Sanford graduated in 2003 from Goodrich High School, about 12 miles east of the shooting site.

Goodrich Area Schools officials did not immediately respond to a request to confirm Sanford’s attendance and graduation from the high school.

At the time, according to the article, Sanford was soon to be deployed to Fallujah, Iraq.

“I’m looking forward to seeing the culture and the people of Iraq,” Sanford is quoted as saying. “I’ll return with the real news of the situation.”

The article says a grandfather served in the Navy and an uncle served in the Marines, both in World War II. His father, Thomas Sanford, is quoted as saying: “Jake’s going voluntarily and plans on returning to his community when his service is over. We are very proud of him.”

Thomas Jacob Sanford appeared to have a young child, according to a review of a Facebook page belonging to a woman believed to be his wife.

A voicemail message left for a phone number listed for his parents was not returned. Attempts to reach his wife were unsuccessful.