Some clarification.
Gunman’s sister, and her boyfriend were among the 9 people killed at the singular mass murder event. Not at a separate location or time

Dayton mass shooter Connor Betts slaughtered own sister during rampage: officials https://t.co/oXWZByQZzr pic.twitter.com/rJ7Z0sfbob

— New York Post (@nypost) August 4, 2019