(October 25, 2006)—Lawyers for a condemned Texas prison inmate who’s scheduled to die just after 6 p.m. Wednesday are challenging lethal injection in a bid to block the execution.

Gregory Summers, 48, was sentenced to die for the 1990 murders of his adoptive parents in Abilene, but he insists he had nothing to do with the stabbing deaths of Gene Summers, 64, Helen Summers, 64 and Gene Summers’ 60-year-old mentally retarded brother Billy Mack Summers.

Prosecutors, however, say Gregory Summers offered $10,000 to Andrew Cantu to carry out the attack.

Cantu was executed in 1999.

Authorities say the parents had been frustrated with bailing their son out of his financial problems and by his attempts to get the proceeds of damage insurance.

Prosecutors showed that Gregory Summers previously collected insurance payoffs from fires at his grandmother's house and a vehicle.

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