Back in May, a trucker crashed into two police cars and three fire trucks on the side of the highway near Yuma, Arizona, killing one of the officers.

He claimed he was checking his mirrors and didn't see them but his cell phone data revealed he was looking at photos of half-naked women on Facebook when it happened.

Police are charging him with second-degree murder.

You can tell in the video that he's blocking the camera from his actions with his wallet.

You can see more on this story at Arizona Daily Star / CBS Las Vegas

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