San Bernardino (CA) PD Lt. Mike Madden entered a center for people with developmental disabilities with three other San Bernardino police officers Wednesday. There, he found 14 people dead and 21 wounded in the nation's worst mass shooting since the 2012 attack at Sandy Hook Elementary School in Newtown, Conn., reports the Los Angeles Times .
"The situation was surreal," Madden, a 24-year veteran, said Thursday night. "It's something that we prepare for, and an active shooter, they talk about sensory overload. … It was all of that and more. It was unspeakable the carnage we were seeing."