Daniel Navarro, 27, of Fond du Lac, was charged with first-degree intentional homicide with a hate crime enhancer for the July 3 crash that killed Phillip Thiessen in Fond du Lac County.
Prosecutors say Navarro struck Thiessen's motorcycle head-on in the town of Taycheedah.
After two psychiatric exams, Fond du Lac County Judge Richard Nuss determined Wednesday that Navarro is not competent to stand trial, meaning he does not understand the court proceedings and cannot assist in his own defense, WLUK-TV reported.
Navarro told investigators he had been harassed by co-workers and neighbors, and poisoned, drugged and verbally attacked by white people because of his race, authorities said.
During an interview at the sheriff’s office, Navarro said he wanted to go to prison for the rest of his life so he could be free from his neighbors, who he could hear making racist comments through the walls of his house, according to a criminal complaint.