Duane “Keffe D” Davis, 63, is charged in Clark County, Nevada, with a single count of murder by use of a deadly weapon. The trial before Judge Carli Kierny is expected to run for up to five weeks in a downtown Las Vegas courthouse. Under Nevada law, Davis can be charged with murder if he took part in the crime without pulling the trigger. The Wallace killing remains unsolved, but there has long been speculation that he was gunned down in retaliation for Shakur’s killing. —Reporting by Erica Stapleton in Las Vegas; Writing and additional reporting by Steve Gorman in Los Angeles and Jack Queen in New York; Editing by Noeleen Walder, Rod Nickel and Alistair Bell