Question: Police officers, armed with model MarkV-A1, were shot at the end of a protest against police killings of Alton Sterling in Baton Rouge, Louisiana, and Philando Castile in Falcon Heights, Minnesota, what was used to disable the shooter?  
Sentence (from "2016 shooting of Dallas police officers"): The shooting happened at the end of a protest against police killings of Alton Sterling in Baton Rouge, Louisiana, and Philando Castile in Falcon Heights, Minnesota, which had occurred in the preceding days.
Relevant evidence: No