The Orlando Shooter's Wife May Have Known What He Was Planning

The wife of the man who killed 49 people at the nightclub Pulse in Orlando, Florida on Sunday may have known about the attack.

His wife, Noor Zahi Salman, told the FBI she was with him when he bought ammunition and a holster, according to NBC News.

She said she tried to talk him out of the attack. She apparently told investigators she drove the shooter to Pulse once so he could check the place out, possibly for the attack.

NBC reports Salman may be charged for not telling officials what she knew about the attack, but no official decision has been made.

Pulse regulars said they saw the shooter at the nightclub on many occasions, according to CBS News. He also reportedly used gay dating apps.

The FBI investigated the shooter on two previous occasions, according to The Daily Beast, but the investigations closed without enough evidence to allow for further investigation.

The FBI tracks "48 high-risk suspects 24 hours a day with teams of a dozen agents apiece," Politico reports, but it is difficult to stop so-called "lone wolf" attackers targeting vulnerable places without a link to a greater organization.

Sitora Yusufiy, the gunman's former wife, described him as "somebody that hurt me and traumatized me" to The New York Times. She said he was verbally and physically abusive to her.

There is a noted link between domestic violence and shootings.

Fifty-seven percent of mass shootings between 2009 and 2015 included the shooter killing a current or former spouse, intimate partner or family member, according to an Everytown Research analysis of FBI data, and 21 out of 133 mass shooters previously had a domestic violence charge.

Citations: NBC, The New York Times, Everytown Research, The Guardian, The Daily Beast, Politico