The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) announced a reward of up to $20,000 for information leading to the arrest and conviction of the individual(s) responsible for the deadly Halloween mass shooting. On October 31, 2019, a shooting incident occurred at a house party in Orinda, CA. The party was held at an Airbnb. The shooting resulted in the deaths of 5 people and injuries to 9 others...