Contra Costa County Sheriff deputies investigate a multiple shooting in Orinda, Calif., on Thursday, Oct. 31, 2019. Four people were killed and four others wounded in a Halloween night party shooting at a large rental home in a wealthy San Francisco Bay Area community, police said Friday. The shooting in the city of about 20,000 just east of Berkeley, happened at a party attended by 100 people said police chief David Cook. (Ray Chavez/East Bay Times via AP)