BANGOR — A Maine State Prison inmate serving a life sentence for killing two women in 1995 has died two weeks after being severely beaten in prison.

The Department of Corrections said 51-year-old Lloyd Franklin Millett died at about 8:40 p.m. Tuesday at Eastern Maine Medical Center. Maine State Police are investigating.

Millett was taken to the Bangor hospital in critical condition after being beaten by another inmate on May 24, but nobody has been charged.

Millett pleaded guilty to strangling two women over a weekend in 1995 while he was working as a farmhand in Turner. Police found one of the victim’s bodies in a closet in his trailer, and the other in a field near a Lewiston hotel.