"Just want to know some answer," says David Guerro, Miller's cousin. "Really sad, 17 years old, a bright future."
Um, David? The answer would likely include something about helping beat a man with a baseball bat rather than being at home with her two (presumably) young children. That might also likely go towards revising your "bright future" assessment.
We know the janitor was legitimately servicing fire extinguishers.
This reads like Miller and Bell (and Gibbs) had no legitimate reason to be there.