SAN ANTONIO -- Testimony is expected to get under way Tuesday in an injury lawsuit against Union Pacific over a deadly train wreck in 2004.

Kenneth Schoenfield is seeking an unspecific amount of damages in a claim that he suffered permanent injuries after inhaling chlorine gas being carried by the train when it collided with another train head-on.

“They ran a caution, be-prepared-to-stop light and they ran through a red light without ever putting the brakes on and ran into another train,” said Dana Kirk, Schoenfield’s attorney. “When you’re carrying hazardous materials, that kind of conduct is simply unacceptable.”

Three people, including the train’s conductor, were killed in the train wreck and about 30 people were injured.

The collision and subsequent derailment happened at about 5 a.m. on June 28, 2004, near Loop 1604 and Nelson Road in southwest Bexar County.