That makes sense to me as well. It’s the use of the term “Suspect A” that throws me off.
The quote you give (and given in the article), calls him “the killer”. But that comes from a spokesperson for the governor. Debra Saunders claims in the first paragraph the governor referred to the killer as “Suspect A”, and that term is used in the headline.
My point is, its use made me wonder if the story was about another suspect (i.e. “Suspect B”) emerging from the investigation. That’s what I expected I would be reading.
Actually I was thinking “Suspect B” would be the person who let “Suspect A” into the theater.
“Suspect C” should be the person who sent the text demanding “Suspect A” be released or there will be more violence.