Police continued to keep a tight lid on details about the ambush or the investigation, including the number of shots fired, where the shots originated and whether the troopers were able to return fire.
But Bivens provided the killer's profile in hopes it might help authorities catch him.
The gunman might be unstable and ranted about his dispute with law enforcement to friends or on social media, Bivens said. He probably lived in the area and made several trips to the barracks to formulate his plans. He used a .308-caliber rifle and was probably an avid hunter or had formal training, and regularly practiced at a shooting range to keep his skills sharp...
Bivens said police are already following up on a number of tips that provided "credible information" about the ambush.