Kimberly Harvill was found dead on the side of a California road on Aug. 14, and her three young children are missing. Los Angeles County authorities are now searching for two people suspected of kidnapping them, the Los Angeles Times reports. According to the LA County Sheriff's Department, Joshua Robertson, 27, and Brittany Humphrey, 22, were last seen with the kids—Joslynn Watkins, 2; Brayden Watkins, 3; and Rylee Watkins, 5. Humphrey is Harvill's half-sister, CBS LA reports.
Robertson has a criminal history, and both he and Humphrey are considered armed and dangerous, authorities say; the pair is believed to have left California. They are likely driving Harvill's green 1999 Ford Expedition, which has a rear sticker that says "RIP Chad Watkins" as well as a six-person stick-figure family decal. Harvill's neighbor tells ABC 7 the children lost their father to suicide. Harvill was found with head trauma and gunshots to the upper body, and police also want to question Robertson and Humphrey about her murder. (Read more kidnapping stories.)