July 18 2016 12:48pm

Raw video: memorial grows to three fallen police officers in Baton Rouge

Authorities in Louisiana are trying to figure out what motivated Sunday’s deadly ambush on police officers in Baton Rouge. Investigators say Gavin Long, a decorated ex-Marine, acted alone when he exchanged gunfire with officers at a gas station, killing three officers and injuring three others. Long was shot and killed at the scene.

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