I'm loath to pass judgement, never having been in the lady's situation myself, so it's not like I can say "I would have handled that so much better."
I subscribe to the Massad Ayoob school of thought regarding private citizens firing warning shots. That is to say, I'm against it. As a private citizen, you are either justified in firing to stop, or you aren't justified in firing at all. Going by the decription of events in the article, I'd say she wasn't justified in firing her weapon at all. She fired her first shot while Guevara Martinez was "inching towards the door"; if he was apparently trying to leave, he didn't present an imminent threat to her
. The second was completely unnecessary. Putting out pieces of high-velocity lead in a residential neighborhood is not a good idea, all the more so when it isn't necessary.
As for Jered's suggestion to "decrease the felon population," she didn't know at the time
he was a felon, did she? Sure, the wailing sirens would have been something of an indication, but she didn't know
. I mean, if a cop were to essentially execute a person because he suspected
the guy was a felon, we'd be outraged, and rightly so.