BROOKLYN - A Brooklyn man has been sentenced to 25 years in prison for killing his girlfriend four years ago.

Prosecutors say Janis Dunston was beaten and stabbed to death by her live-in boyfriend, Douglas Barnes, in Brownsville in September 2009. Barnes was convicted of first-degree manslaughter earlier this month.

The two had dated for several years. Barnes stabbed the mother of two 13 times following a heated argument.

Dunston's family and friends were in the courtroom when Barnes received the maximum sentence for the crime. They say justice has finally been served for the mother of two daughters.

Barnes stood up and apologized to Dunston's family by saying he will never get over what he did. The judge called him a "devil" who "butchered" Dunston and that the maximum sentence was necessary.

Barnes' daughter says she feels terrible about what her father did and that her heart goes out to Dunston's family. She says she hopes the sentencing will bring closure to both sides.