Semi driver facing charges after crashing into school bus, injuring 20

Updated: 1:50 p.m. on June 6, 2018

COLUMBIA COUNTY, Wis. (CBS 58) -- Wayne Murphy appeared in Columbia County Court Thursday morning.

A preliminary hearing was rescheduled for July 12. 

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Posted: 9:34 p.m. on June 6, 2018

COLUMBIA COUNTY, Wis. (CBS 58) -- A man accused of crashing a semi-truck into a Milwaukee school bus is facing ten charges.

Investigators say Wayne Murphy was over-medicated before the crash that injured 20 people on May 23. 

Students and chaperones from Hope Semper Christian School in Milwaukee were on a field trip when their bus had mechanical issues.

They were pulled over on the side of a road in Columbia County when the bus was hit by a semi. 

Investigators say they searched Murphy's truck and found a prescription for Xanax. Based on the pill count, they believe he was taking double the recommended dose. 

Murphy is being held on a $35,000 bond. He is expected at a preliminary hearing on Thursday morning.