Watch: Prosecutor explains why teen shooter's parents are being charged

In a news conference today, prosecutor Karen McDonald announced that the parents of Ethan Crumbley the teen accused of killing four people at a Michigan high school have each been charged with four counts of involuntary manslaughter.

"I'm announcing charges against the shooter's parents, Jennifer and James Crumbley," she said at a news conference today (see first tweet below). — Read the rest