Mother Erica Garner, 43, shot in head while picking son up from basketball practice - 17-year-old Ralph A. Marshall shot her in the head during an ill-fated carjacking

Stupified by eating lead paint chips is 17-year-old Ralph A. Marshall 

DETROIT, MI -- A mother was picking her son up from basketball practice in Detroit Wednesday night when a carjacker approached and shot her in the head.

Erica Garner, 43, of Detroit died a short time later.

Police have arrested the suspect, 17-year-old Ralph A. Marshall of Detroit.

He's now charged with felony murder, carjacking and felonious use of a firearm.

" ... Marshall approached her armed with a gun to steal her car and fatally shot her in the head," Wayne County Prosecutor Kym Worthy's office said in a charging statement. "Detroit police officers near the crime scene attempted to investigate Marshall it is alleged that he fled on foot, but was later arrested by the police."

WJBK-TV, Fox 2 News reported Wednesday that Garner's 11-year-old son was walking to his mother's car when he saw the suspect. His description helped police find his mother's killer.

If convicted, Marshal faces life in prison. While first-degree murder carries a punishment of mandatory life in prison without the chance of parole, a recent Supreme Court ruling may require the court evaluate Marshal's case independently and give an opportunity for parole.

The Supreme Court said mandatory life sentences for those who commit crimes while they are under 18 are unconstitutional.

Marshall is jailed and expected back in court Feb. 5 for a probably cause hearing and Feb. 11 for a preliminary examination before Judge Kenneth King.