Duane 'Keffe D' Davis sentenced to 40 years to life for Tupac Shakur's murder

Duane "Keffe D" Davis -- the only person ever charged with the murder of Tupac Shakur -- was sentenced Tuesday in a Las Vegas court after being convicted.

Duane "Keffe D" Davis -- the only person ever charged with the murder of Tupac Shakur -- was sentenced Tuesday in a Las Vegas court after being convicted.