Not sure I’d agree that this was a ‘spree’ shooting, which implies random uncontrolled behavior.
Spree shooting sounds more scary than ‘targeted shooting’ though, which is probably why they went with it.
"Spree killers (sometimes referred to as rampage killers) murder two or more victims, but at more than one location. Although their murders occur in separate locations, their spree is considered a single event because there is no "cooling-off period" between the murders."
Lots more at the link...