GWINNETT COUNTY, Ga. -- Minutes before being sentenced by a Gwinnett County judge, two brothers apologized for attempting to kill their parents.

Cameron and Christopher Ervin pleaded guilty to numerous charges Monday in an attack on their parents on Sept. 5, 2015. Authorities said the two drugged their parents and tried to blow their home up. When that failed, they tried to smother their parents, and stabbed their father when he tried to get away.

Watch: Cameron Ervin addresses judge

Cameron Ervin, who turned 19 on Monday, expressed extreme regret and remorse. He said he was sorry for breaking up his family. He said since his arrest, he realizes how much he loves his parents and how much they love him. He said he held a grudge against them for the way they brought him up and that he turned to alcohol and drugs. He noted that it was his birthday and said being able to see his parents and how much they love him is a gift. He said that he and his brother were not the same people they once were, and said he's grateful that God spared them.

WATCH: Christopher Ervin addresses judge

Christopher Ervin told the judge that he has substance abuse problems, saying the difference between when he's sober and under the influence is "night and day." He apologized and said he was "at lowest level part of my life." He explained that he got into drugs and alcohol after high school. He said he became addicted and lost all control.

Since his arrest, Christopher Ervin said he's completed an AA program and has been sober for 14 months. He apologized to his parents and his brother for not confiding in them and not trusting them to help. He then apologized to his brother for introducing him to drugs, and not being the brother he should have been.

PHOTOS: Ervin brothers plead guilty

Both parents also testified Monday, saying they forgive their sons and asking the judge for leniency.

In the end, the judge sentenced the brothers to 50 years in prison, with the first 20 to be served and the remaining 30 to be on probation. They'll be eligible for parole after serving 10 years.

PHOTOS | Brothers accused of trying to kill parents

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