Associated Press
Selina Gray, of Sanford, Fla., shows her sign at the rally. Thousands of supporters attend a march, lead by NAACP, from Crooms Academy to the Sanford Police Station for a rally in support of Trayvon Martin, the teen shot by George Zimmerman while on Neighborhood Watch patrol, Saturday, March 31, 2012 in Sanford, Fla.

George Zimmerman, the man who shot Trayvon Martin in alleged self-defense, should immediately submit to a polygraph exam. In fact a polygraph exam should be standard procedure in any and all police investigations when a citizen uses deadly force. I am not anti guns. I understand citizens have a right to self-defense.

The concern I have is that there are vigilante types in our society. The outrage over Trayvon's death is that the police never conducted a thorough investigation.

If police officers ever discharge their weapon they are subject to rigorous scrutiny by their own department, the county attorney and the Utah Attorney General's office. Private citizens who use deadly force and claim self-defense should be held to the same standard as law enforcement.

If you choose to carry a weapon then you better understand when and how you can legally use it. That is not an unreasonable expectation.

Neil Thomas