^And it would be up to you to show they were trespassing. Probably not advisable. In any case, killing several uniformed police officers just because they didn't have a warrant makes you look pretty dodgy. It's not like they were whipping their guns out in preparation for some American-style police brutality, or out to make any illegal arrest. Even in Texas, you or your property needs to be under some threat before you can start using force, and it would probably not involve slaughter unless you were in danger of death yourself.
http://www.capitol.state.tx.us/tlodo...l/SB00378F.htm