Hain was born in Tulsa, Oklahoma. As a teenager, he accumulated juvenile convictions for trespassing, theft, and unauthorized use of a motor vehicle.  On October 6, 1987, Hain and Robert Lambert carjacked an automobile in Tulsa that was occupied by Michael Houghton and Laura Sanders. Hain and Lambert eventually stopped the car, robbed Houghton and Sanders, and placed them in the trunk of the car. Hain set fire to the car, which resulted in Houghton and Sanders’ deaths. Hain was 17 years old at the time of the murders.  Hain and Lambert were arrested on October 9, 1987. At trial in 1988, they were both convicted of capital felony murder and sentenced to death by lethal injection. In 1994, an appeals court determined that because the jury had not been told of the possibility of a life sentence without any chance of parole, Hain was entitled to a new sentencing hearing. At the re-sentencing hearing, the new jury again sentenced Hain to death for the murders. All of Hain’s subsequent appeals were eventually dismissed, and in February 2002 the United States Supreme Court refused to hear his appeal, which was based on arguments of unconstitutionality executing juvenile offenders.

In February 2003, the U.S. Supreme Court overturned a stay of execution that had been put in place by the 10th Circuit Court of Appeals, and Hain was executed by lethal injection at the age of 32. He was the 60th person executed by Oklahoma since 1976 when the death penalty was reinstated by the United States Supreme Court.  In March 2005, less than two years after Hain’s execution, the United States Supreme Court held in the 5–4 decision of Roper v. Simmons that the Eighth Amendment to the United States Constitution was violated when offenders were executed for crimes committed prior to the age of 18. If Roper v. Simmons had been decided prior to Hain’s execution, Hain could not have been legally executed.