Sheriff Geoff Dean gave a briefing on the investigation into the mass shooting at the Borderline Bar and Grill in Thousand Oaks, California, which left at least 12 people dead. He identified the gunman as 28-year-old Ian David Long.

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Mass shooting at Borderline Bar and Grill in California

The gunman is now believed to be dead after multiple people were shot during a "country night" for college students.

Bar shooting survivors recount horror

Survivors of the mass shooting in Thousand Oaks, CA, speak about what happened when a gunman fatally shot 12 people. SUBSCRIBE to ABC NEWS: https://w...

Witnesses on "utter chaos" and escape from California bar shooting

Thirteen people, including a sheriff's sergeant and a suspected gunman, were killed in a shooting at a crowded Southern California bar Wednesday night...

Shooting at California bar leaves 13 dead including gunman

Police say 12 people, including a sheriff's deputy, were shot dead at a bar in Thousand Oaks, Calif., late Wednesday night. The gunman is also dead. #...

Thousand Oaks shooting survivor: "My friend killed my other friends"

Thousand Oaks, California, is grieving the loss of 12 people gunned down at a bar filled with college students. Hundreds gathered Thursday night to re...

VIDEO: Thousand Oaks shooting survivor also survived Las Vegas shooting | ABC7

A man who survived the deadly mass shooting last year in Las Vegas also miraculously came out of a mass shooting at a bar in Thousand Oaks alive Wedne...