Overview

• Police identified the gunman as Thomas Jacob Sanford, 40, of Burton, a former U.S. Marine who was shot dead by responding officers within minutes.
• The attacker rammed a pickup into the Grand Blanc Township meetinghouse, opened fire with an assault-style rifle, and is believed to have deliberately set the building ablaze.
• Hundreds were attending services, and officials cautioned that additional victims may be found as crews continue searching the heavily burned structure.
• The FBI is leading the federal investigation with ATF support, and authorities are searching the suspect’s residence and electronic records as they work to determine a motive.
• NBC News reported that investigators found as many as three improvised devices at the scene, citing two senior U.S. law enforcement officials.