Why is the alleged perpetrator's age relevant? Seems like a headline intended to provoke an emotional response.
Recently, here in Switzerland, police departments argued the pros and cons of naming suspect nationality.
If you do it, readers can actually get a clear picture of the demographics of criminals. However, the media can cherry pick those suspects that fit their custom brand of racism.
If you don't do it, racist/ageist/whatever prejudices can simply fill the minds of the readers with their preconceived notions of what the suspect "must be like", which isn't better.
On the other hand some publications will publish gender, race, religion, age etc regardless.
IIRC it varies on a state-by-state basis (much like for Florida Man) which data they have to or can publish.
Point being: if the police department only publishes "43 year old female", the media can't publish race, religion, etc..
I’ve seen quite informative descriptions by people: height, build, age, color of clothes but purposely leave out another physical characteristic. I’ve also seen it when someone does include this characteristic you will find people who complain that including this information furthers stereotypes (altho when video is included it’s kind of nonsensical to say that, unless it’s poor quality or at night), but when it’s a majority suspect you’ll have comments like, oh, just another *guy. Like zero self awareness.