MEMPHIS, Tenn. (AP) _ A jury won't be allowed to hear the admission of a Texas teenager charged in the murder of a Tennessee state trooper.

Tipton County Circuit Court Judge Joseph Walker ruled Monday to suppress juvenile court testimony from 18-year-old Alejandro Chevo Gauna.

Gauna and 20-year-old Orlando Daniel Garcia, both of Austin, have been charged with shooting trooper Calvin Jenks during a traffic stop on a rural Tipton County road north of Memphis in January 2007.

During the juvenile court hearing, Gauna testified that he shot the trooper, but Walker ruled that statement will not be presented to jurors.

The judge also granted a request from the defense for a sequestered jury for the trial that is scheduled to start May 12.

Garcia was found guilty of facilitation of first-degree murder. He faces a prison term of 15 to 25 years.

Information from: The Commercial Appeal,

Copyright 2008 The Associated Press.