Six times

When asked by the arraignment judge, “Why did you shoot the man 6 times?"

The woman replied under oath, “Because, when I pulled the trigger the 7th time, it only went click.”

Found on facebook ...
http://www.iamatexan.com/2015/10/21/this-is-why-you-dont-mess-with-texas-women/
18 MAR 2019 - I'm saddened to learn that link NO LONGER EXISTS - Sigh ... :(

Sadly, the article ends with ...

(Yes, this is a joke. Sort of. Don’t think you can get away with purse snatching in Texas. You can’t. Our women are well-armed, know how to defend themselves, and beautiful. And it’s Texas – the law is on their side.)

Oh, Well. New Texas Urban Legend is born. :-)
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