Pakistan, Sept. 9 -- A bullet shell recovered from the Mir Raza crime scene does not match a security guard's pistol, investigators said. Officials reported the finding on Wednesday. They said the markings on the recovered shell differed from test shells fired from the guard's weapon. The forensic finding could raise further questions about the circumstances surrounding Raza's death.

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Mir Raza Ali was an IBA graduate and businessman. He was found dead in Karachi's Gulistan-e-Jauhar after going missing on July 28. His final postmortem report ruled out suicide. It confirmed that he died from a gunshot wound. Raza's father has consistently maintained that his son was...