Participating in the crime with Glen was a guy named Corbett. See article: http://findarticles.com/p/articles/mi_qn4191/is_20060718/ai_n16640872/
“Corbett, who has taken the name Hasani Chinangwa after converting to Islam in prison, has become a model inmate, but Smit and Russel still travel to his parole hearings, urging the board to keep him locked up.
Corbett is a sociopath who knew what he was doing, but didn’t care, Russel said. Glenn idolized Corbett.
They were angry, their rampage fueled by black militancy of the times and drugs, according to authorities and trial testimony. Despite the decades that have passed, the original investigators doubt either can be considered rehabilitated.”
Was this a race crime?
You betcha.