In an accident south of Billings early yesterday morning a Texas truck driver for the Army and Air Force Exchange, ran through a 48 foot grain trailer which had unhooked and was blocking the roadway. The trailer, driver by Randy Bailey of Billings, became unhooked when the driver attempted to turn west on US412 from County Road 30 and blocked the roadway. Joel Goodman, of Texas, struck the center of the trailer, slicing it in half. Goodman died of massive injuries after being pinned in the wreck for about 2 ½ hours. The accident remains under investigation.