Originally Posted by redraider
And in Texas, I would be completely justified for stopping the threat. Deadly force CAN be used to stop a felony.
That isn't correct. Deadly force can be used in response to certain, listed crimes (which include both felonies or misdemeanors), provided you meet all the other criteria in the statute (see Aguila Blanca's post for an example).
However, the mere fact that it is a felony under Texas law isn't enough to justify deadly force. Otherwise, I'd be able to use deadly force to stop aggravated perjury, which would tend to make for an unworkable system of justice.