PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: People hug and pray before the procession carrying the body of Ventura County Sheriff Sgt. Ron Helus, who was killed in a mass shooting at the Borderline Bar and Grill, leaves Los Robles Hospital on November 8, 2018 in Thousand Oaks, California. 12 people have died including the sergeant plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: Mourners cry and comfort each other during a vigil for the victims of the mass shooting at the Thousand Oaks Civic Arts Plaza on November 8, 2018 in Thousand Oaks, California. Twelve people including a Ventura County Sheriff sergeant and the gunman died in the mass shooting at Borderline Bar and Grill . (Photo by Kevork Djansezian/Getty Images)Photo by: Kevork Djansezian PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: Mourners cry and comfort each other during a vigil for the victims of the mass shooting at the Thousand Oaks Civic Arts Plaza on November 8, 2018 in Thousand Oaks, California. Twelve people including a Ventura County Sheriff sergeant and the gunman died in the mass shooting at Borderline Bar and Grill . (Photo by Kevork Djansezian/Getty Images)Photo by: Kevork Djansezian PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: The procession carrying the body of Ventura County Sheriff Sgt. Ron Helus, who was killed in a mass shooting at the Borderline Bar and Grill, leaves Los Robles Hospital on November 8, 2018 in Thousand Oaks, California. 12 people have died including the sergeant plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: People hug after praying before the procession carrying the body of Ventura County Sheriffs Sgt. Ron Helus, who was killed in a mass shooting at the Borderline Bar and Grill, leaves Los Robles Hospital on November 8, 2018 in Thousand Oaks, California. Twelve people were killed, including the sergeant and the gunman, after a mass shooting at the Borderline Bar and Grill in Thousand Oaks late Wednesday night. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: The procession carrying the body of Ventura County Sheriffs Sgt. Ron Helus, who was killed in a mass shooting at the Borderline Bar and Grill, leaves Los Robles Hospital on November 8, 2018 in Thousand Oaks, California. Twelve people have died, including the sergeant and the gunman, after a mass shooting at the Borderline Bar and Grill in Thousand Oaks late Wednesday night. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: People hold flags as the procession carrying the body of Ventura County Sheriffs Sgt. Ron Helus, who was killed in a mass shooting at the Borderline Bar and Grill, leaves Los Robles Hospital on November 8, 2018 in Thousand Oaks, California. Twelve people were killed, including the sergeant and the gunman, after a mass shooting at the Borderline Bar and Grill in Thousand Oaks late Wednesday night. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: Firefighters raise a flag at Los Robles Hospital to hang over the procession carrying the body of Ventura County Sheriff Sgt. Ron Helus, who was killed in a mass shooting at the Borderline Bar and Grill, on November 8, 2018 in Thousand Oaks, California. 12 people have died including the sergeant plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: Light shines from inside The Borderline Bar and Grill, the scene of a mass shooting on November 8, 2018 in Thousand Oaks, California. At least twelve people have died, including a Ventura County Sheriffs Department sergeant, plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub A gunman burst into a packed bar in Southern California and opened fire on people line dancing, killing at least 12 people before he was found dead at the scene.Photo by: @VCscanner/Twitter PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: F.B.I. agents monitor the scene near the Borderline Bar and Grill, where a mass shooting occurred, on November 8, 2018 in Thousand Oaks, California. According to reports, at least 12 people have died, including a Ventura County Sheriffs Department sergeant, plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: A truck is parked on the freeway off-ramp from the 101, near the Borderline Bar and Grill, the scene of a mass shooting, is closed on November 8, 2018 in Thousand Oaks, California. At least twelve people have died, including a Ventura County Sheriffs Department sergeant, plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: Neon signs are on display at The Borderline Bar and Grill, the scene of a mass shooting, is seen on November 8, 2018 in Thousand Oaks, California. At least twelve people have died, including a Ventura County Sheriffs Department sergeant, plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew PHOTOS: Mass shooting at Thousand Oaks nightclub THOUSAND OAKS, CA - NOVEMBER 08: A Ventura County Sheriffs officer stands near a vehicle near the Borderline Bar and Grill, where a mass shooting occurred on November 8, 2018 in Thousand Oaks, California. At least twelve people have died, including a Ventura County Sheriffs Department sergeant, plus the gunman. (Photo by David McNew/Getty Images)Photo by: David McNew