SIMI VALLEY, Calif. (KEYT) – Two Los Angeles 18-year-olds were arrested after allegedly robbing a person they met regarding a watch sale through Facebook Marketplace Wednesday. On June 10, around 8:04 p.m., officers were dispatched to a reported robbery in the 1500 block of Emeric Avenue stated a press release from the Simi Valley Police Department. According to Simi Valley Police, the victim had arranged to sell a watch through Facebook Marketp…