IMO There are many capable LE agencies in that general vicinity that are bigger than the Windsor PD. There are Weld County Sheriff Dept, Colorado Bureau of Investigation, even Greeley and Fort Collins PD that are right there in the area and could have helped out a smaller department if asked. So why the jump to the FBI so soon? Bullets matching? A note left at the scene? Just brainstorming, but there has to have been some kind of evidence that led the Windsor PD to ask the FBI to help so quickly, and also for the FBI to agree to be there investigating so soon after the shooting yesterday morning.