I’m not sure why you take issue with the facts that the word aggravated in this context means that the people are implied, or that adding words is not easier to read. It’s okay that you didn’t know what aggravated means, but it still doesn’t change the fact that this is redundant information. Redundant information is harder to read, and the specific gender of the victim does not add anything to the context for the headline, a de facto harder to read title. It’s possible that this was done on purpose, or that the author was also unaware that aggravated means people are involved and felt they needed to add words.