"Armed Response" is a decent episode. However, having the killer admit it when he's confronted...well, that's an overused trope in "Murder, She Wrote".
Jessica is visiting Texas and ends up breaking her foot at the airport. Her oily friend and lawyer (Kevin McCarthy) insists on bringing her to an exclusive hospital for the wealthy and famous...and you KNOW sooner or later someone there will be murdered. Who it is and why...well, you'll have to see that for yourself.
The characters are interesting as is the story. I just hate it, however, when killers admit their guilt when confronted...it just seems like an overly used plot element. Still, it's good...and worth seeing.