Is there some doubt over whether the shooting actually occurred? If not, why must we call the unknown person a "suspect," rather than a criminal or a perpetrator or an attempted murderer?
News organizations are afraid of getting sued if they report that someone committed a crime. That’s why they always say someone is a “suspect” or “person of interest” or that a crime “allegedly” happened.
I hate to hear that someone is dead, and someone “allegedly” shot someone. They aren’t “allegedly” dead, they are actually dead, but to avoid lawsuits, news people qualify everything they say about a crime.