LAS VEGAS, Aug. 18 -- When Duane Davis took his seat in a Clark County courtroom Monday morning, it was not the first time he had talked about killing Tupac Shakur. He talked about it in a memoir. He talked about it in television interviews. He talked about it, prosecutors now argue, in enough detail that his own words became the cornerstone of a murder charge.

Now those words may be what ends his freedom.

Opening statements in the murder trial of Davis, 63, known publicly as "Keffe D," began August 17 before Judge Carli Kierny at the Regional Justice Center in Las Vegas. The proceeding is expected to last up to six weeks. Davis faces one count of murder using a deadly weapon with intent to promote a criminal gang, stemming from the Sep...