[Tilted Irish Kilt]

(from the article):" One was arrested at the scene and another nearby, in his car on a bridge near d’Orléans where he called 911 to say he wanted to cooperate with police."

That statement lone, makes the situation highly suspect.
We are talking about approximately 23 people shot in a singular incident ; that seems highly unlikely with a single shooter.

[Tilted Irish Kilt]

" We are talking about approximately 23 people shot in a singular incident "
Correction : "We are talking about approximately 21 people shot in a singular incident .
Explanation : Not enough coffee yet

[Windflier]

We are talking about approximately 23 people shot in a singular incident ; that seems highly unlikely with a single shooter.

Not if he had a full auto weapon.