MEXICO CITY (AP) -- The Mexican government said Friday it was fighting the execution in Texas of a

MEXICO CITY (AP) -- The Mexican government said Friday it was fighting the execution in Texas of a Mexican man known as the "Railroad Killer," arguing he shouldn't face the death penalty because he's mentally ill.
Foreign Relations Secretary Luis Ernesto Derbez has sent a letter to the Texas parole board opposing the execution by lethal injection of Angel Maturino Resendiz, 46, who defense lawyers have said is mentally unfit because he believes he is half-human, half-angel.
The Foreign Relations Department also is preparing legal protests against the execution scheduled for Tuesday, the department said in a news release.
A Texas judge ruled this week that Resendiz was mentally competent to be executed.
Resendiz was convicted of raping and murdering Houston-area physician Claudia Benton in her home in December 1998.
He also has been linked to eight slayings in Texas, two each in Illinois and Florida, and one each in Kentucky, California and Georgia between 1986 and 1999.