would you contact police if neighbor accidentally fired shotgun and bullet penetrated into your home?

hello. yesterday our family was on first floor and suddenly there was loud popping sound from second floor. I went upstairs and noticed several holes on our wall which is shared by our next home. they looked like shotgun holes.  I suspected possible accidental shooting that you hear from news and expected our neighbor would come and apologize or something. But nobody came for about 5 min. I began to suspect possible burglary and became worried and called local police because i was afraid to go there to check. 

I expected maybe couple of cops would show up to make sure everyone is ok. But more than 10 cops came. And they weren't very respectful and nice to our neighbors. They almost treated neighbors like possible crime suspect and arrested him and I felt kind of bad and sorry for our neighbor. Cop even asked me if we want to press charge which I declined.

We have been good neighbors. We never invited each other for dinner or anything but we would greet each other and shared some small talks and we would help each others out from time to time in minor things.

Later he came to apologize for the accident and led us know that he would pay for all the damage. I was just wondering if I did right thing by calling police and wonder how others would have dealt with this. I was afraid to going to their home because I may get shot if there was robber with gun. Would you have done anything different? Is calling police without first going to neighbor to check happened overkill?