A federal judge Tuesday threw out the death sentence of a Pennsylvania inmate convicted of strangling his cellmate nearly a decade ago. U.S. District Judge Malcolm Muir ruled yesterday that prosecutors should have disclosed to David Paul Hammer's lawyers the existence of four interviews that may have supported Hammer's claim that he used rope made from bed sheets for bondage sex.

The interviews could have led the jury to conclude that Hammer did not engage in substantial planning before he killed bank robber Andrew Marti at Allenwood Federal Penitentiary in 1996, the judge said. The judge ordered a new sentencing hearing.

Prosecutors argued that Hammer killed Marti after the two agreed to stage a hostage-type scenario in which Marti was tied to a bunk as a way to speed Marti's transfer to a different federal prison. But Hammer has denied that, saying he and Marti used the ropes "for other purposes," Muir wrote. Hammer told doctors that he and Marti engaged in sexual activity "around the time of the murder," the judge said.