Police have arrested a man with a long history of involvement in racist and neo-Nazi groups for the shooting deaths of three people outside two separate Jewish community centers near Kansas City, Missouri on Sunday.

According to reports, authorities have charged Frazier Glenn Cross, 73, with first degree murder after he opened fire at a Jewish Community Center in the town of Overland Park, where he killed a man and his grandson in the parking lot. Following that shooting, it appears Cross drove a short distance to a retirement home, also with ties to the Jewish community, and again open fired where he killed a woman.

After being taken into custody by police, numerous witnesses said Cross could be seen and heard shouting, “Heil Hitler!” from the back of a patrol car. Police would not confirm that, but Miller has a well-documented past as a white supremacist.

The Associated Press reports that though “the suspect was booked under the last name Cross, he is probably better known as Frazier Glenn Miller. A public records search shows he has used both names, but he refers to himself on his website as Glenn Miller and went by the name Frazier Glenn Miller in 2006 and 2010 campaigns for public office.”