The FBI has interviewed the head of D.C.'s center for the lesbian, gay, bisexual and transgender community because a volunteer at the center is suspected in today's shooting of a security guard at the Family Research Council, a religious conservative organization also based in D.C.

The suspect in today's shooting, Floyd Corkins II of Virginia, had been volunteering on some weekends at the front desk of The Center, D.C.'s LGBT community center, the center's executive director, David Mariner told BuzzFeed.

"The FBI was just here, and we are cooperating with them fully," Mariner said. "We are shocked and appalled that this happened, and I cannot even imagine-"

He added, "All of our volunteers, they register online, they go through a background check, and then they go through a training."