Majority of shootings use guns

Here is the predictable gun control rant:

The shooting at Red Lake High School is the latest mass murder-suicide to occur in the United States and follows, by less than two weeks, a murder- suicide at a Wisconsin hotel that resulted in eight dead. These shootings, like the vast majority of such incidents, were perpetrated with a gun.

Yes, most of these shootings use guns!

The Minnesota student used police-issued guns that he stole from his grandfather. It happened on an indian reservation. The school security guard was unarmed. Exactly how would additional gun control laws have helped?