![TOPSHOT - FBI agents are collecting evidence at the home of suspected nightclub shooter Ian David Long in Thousand Oaks, northwest of Los Angeles, on November 8, 2018. - The gunman who killed 12 people in a crowded California country music bar has been identified as 28-year-old Ian David Long, a former Marine, the local sheriff said Thursday November 8, 2018. The suspect, who was armed with a .45-caliber handgun, was found deceased at the Borderline Bar and Grill, the scene of the shooting in the city of Thousand Oaks northwest of downtown Los Angeles. (Photo by Apu Gomes / AFP)APU GOMES/AFP/Getty Images](https://cdn.statically.io/img/media.cnn.com/api/v1/images/stellar/prod/181109143851-cnnee-madre-tiroteo-armas.jpg?c=16x9&q=w_1280,c_fill)
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FBI reveals keys to spotting a mass shooter before an attack
The FBI report identified ways to identify mass shooters before they strike. Historical data shows there's an uptick in US mass shootings in early July.
02:26
- Source:
CNN
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![TOPSHOT - FBI agents are collecting evidence at the home of suspected nightclub shooter Ian David Long in Thousand Oaks, northwest of Los Angeles, on November 8, 2018. - The gunman who killed 12 people in a crowded California country music bar has been identified as 28-year-old Ian David Long, a former Marine, the local sheriff said Thursday November 8, 2018. The suspect, who was armed with a .45-caliber handgun, was found deceased at the Borderline Bar and Grill, the scene of the shooting in the city of Thousand Oaks northwest of downtown Los Angeles. (Photo by Apu Gomes / AFP)APU GOMES/AFP/Getty Images](https://cdn.statically.io/img/media.cnn.com/api/v1/images/stellar/prod/181109143851-cnnee-madre-tiroteo-armas.jpg?c=16x9&q=w_250,c_fill)
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FBI reveals keys to spotting a mass shooter before an attack
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![Undated handout photo issued by Hertfordshire Police of Kyle Clifford, 26, who is wanted in connection with the murders of three women in Bushey. Issue date: Wednesday July 10, 2024. PA Photo. See PA story POLICE Bushey . Photo credit should read: Hertfordshire Police/PA Wire
NOTE TO EDITORS: This handout photo may only be used in for editorial reporting purposes for the contemporaneous illustration of events, things or the people in the image or facts mentioned in the caption. Reuse of the picture may require further permission from the copyright holder.](https://cdn.statically.io/img/media.cnn.com/api/v1/images/stellar/prod/01j2dtr782xsjsbfgqf7srgyx6-20240710121455536.jpg?c=16x9&q=w_250,c_fill)
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