Victor Hernandez Junior is wanted for the murder of Jose Luis Talavera of Brownsville.
The 16-year-old Talavera was shot, set on fire and dumped in an open grave outside the Brownsville city limits on April 11, 2009.
Authorities found his body near Florida Road.
One person has already been arrested and charged in the teen TMs death, but the prime suspect, Hernandez, was never located.
Hernandez is 5'3", 125 pounds, with brown eyes and brown hair.
Investigators say the 22-year-old Hernandez should be considered armed and dangerous.
If you have any information on his whereabouts, call Cameron County Crime Stoppers at (956) 350-5551.
Hernandez Junior has known addresses in Brownsville and Matamoros, Mexico.