Edward L. Lafleur, 57, of Indianapolis, Ind., appeared before 37th Associate Circuit Judge Jo Beth Prewitt.
Prewitt read the charges of involuntary manslaughter and felony assault to Lafleur. He stated he understood both charges and that the trucking company he works for is trying to hire him a criminal attorney.
Judge Prewitt scheduled him to reappear before the court Oct. 29 to give him time to seek representation.
The charges stem from an accident that occurred Sept. 25 when a 2005 Freightliner driven by Lafleur drove into a highway construction zone on U.S. 63 north of Thayer.
The trooper who investigated the accident, Ray Rees, said Lafleur failed to reduce his speed as he drove through the work zone and approached two vehicles that were stopped for a flagman. The Freightliner struck the rear of a Chevrolet Blazer driven by Deborah Holloway, causing it to overturn in the roadway. Holloway was transported to Baxter Regional Medical Center in Mountain Home for treatment.
Rees said the construction zone was well-marked and there were five different warning signs alerting drivers of the road construction.
The flagman, Mikey W. Workman, ran from the roadway into a ditch as the Freightliner ran off the right side of the road and overturned. The trailer towed by the Freightliner came to rest on Workman and killed him.