LOS LUNAS, N.M. (February 20, 2014) Court documents say a 15-year-old New Mexico boy accused of killing his 12-year-old friend struck the younger boy after an argument over the teenager's 4-month-old daughter.
An arrest warrant affidavit says the 15-year-old suspect hit Alex Madrid, of Albuquerque, on the left side of his head and then placed him under a mattress in a field west of Los Lunas.
The documents mention the teen's daughter, but don't list her age.
Madrid's body was found Tuesday, authorities said.
The teenager told deputies Madrid had tried to stab him with a screwdriver.
He has been charged with first-degree murder and tampering with evidence.
Under New Mexico law, the state can charge minors as adults only if they are at least 14.