A judge has scheduled two dates for the preliminary examination for a man charged with terrorism in a shooting spree that targeted motorists along a highway corridor in four Michigan counties.

The pre-exam conference was Monday for Raulie Casteel. He went before Howell District Judge Carol Sue Reader. He is scheduled to go back to court March 27 and 29.

Casteel's preliminary hearing will determine whether there's enough evidence to send the case to trial. He also could waive his right to the preliminary hearing.

The unemployed geologist is charged with intent to murder, terrorism and several gun crimes. He faces a similar set of charges in Oakland County.

Authorities have not said what they believe is the motive behind the two-dozen shootings in October across a broad swath of southern Michigan. Only one injury occurred.

About Casteel:

On professional websites, the 43-year-old Casteel described himself as a geologist and soil scientist with experience in environmental cleanup. He's a Michigan native who lived in Taylorsville, Ky., before returning to his home state last year.