https://www.breitbart.com/politics/2019/12/29/watch-good-guy-gun-shoots-alleged-texas-church-shooter/?fbclid=IwAR2rEdzcPC2CR54QofMBnk_Yo1UnXffY1dudRX—uCfUNQPdx9R4pgj5iyA
Wow, that was a single shot to the head of the perp. He went down like a sack of potatoes.
Sounded like a .45 cal pistol.