Chief Lanier offers Navy Yard shooting timeline

WASHINGTON (WJLA) - For the first time, D.C. Police Chief Cathy Lanier toured the crime scene inside building 197 at the Navy Yard in Southeast D.C.

Speaking one-on-one with ABC7 for this first time since the mass murder at the Navy Yard, Lanier says it took an hour-and-a-half to walk the entire scene.

“The first thing that struck me … is just how massive the building is and what it must have felt like for the officers responding as gunfire is ongoing,” she says.

The chief says teams off officers pursued gunman Aaron Alexis for about 30 minutes through a labyrinth of narrow hallways and office cubes.

“They walked in to the most complicated scenario and they just went straight toward the danger,” she says. “Each cubicle has to be cleared individually so this is a daunting task as they go through and clear this.”

Ian Glick is chairman of the Park Police officer's union. He revealed Thursday that the Park Police officer who teamed with an MPD SWAT team member to shoot and kill the gunman has been a cop for only three years and, though uninjured, his life has been changed.

“There was carnage everywhere in this building absolute carnage when officers have to go past people asking for help because you have to neutralize the threat that weighs heavy on your mind,” Glick says.

Glick says at the end, the two officers in a V formation found Alexis in a cubicle. As Alexis pulled his trigger, both officers fired.

“I saw police officers do some of the most heroic things,” Lanier says.