Frazier Glenn Cross, Jr., 73, is suspected of fatally shooting a 14-year-old Eagle Scout and his grandfather in the parking lot at the Jewish Community Center of Greater Kansas City campus in Overland Park then gunning down a woman at Village Shalom, a retirement community that is several blocks away from the center, law enforcement officials said.

KSHB reporter Andres Gutierrez told MSNBC that the suspect who was taken away in the back of a police car yelled “Heil Hitler” at onlookers.

A civil rights organization that tracks hate groups said it has long known about Cross, who is from Missouri.

The Southern Poverty Law Center says Cross is known to them using aliases — Glenn Miller or Frazier Glenn Miller — and is the former Grand Dragon of the Carolina Knights of the Ku Klux Klan.