P.S. :-)
Found these sites tucked away. Not sure if they are working as my computer does
not want to hook up with the web too easily this morning.
And not sure if they are lethal. Turtles need help surviving so I would advise
trying to capture and release before lethal methods are used.
Hope these links work for you.
commercial turtle trap
http://www.texastastes.com/p239.htm
homemade turtle trap
http://www.chelydra.org/
k30a