Brooklyn DA Eric Gonzalez announced today that Daniel St. Hubert was sentenced to 50 years to life in prison for the 2014 elevator stabbing of two children.

St. Hubert was convicted last month of second-degree murder and second-degree attempted murder for the attack on 6-year-old PJ Avitto and 7-year-old Mikayla Capers. Avitto was killed in the attack.

"This defendant committed an unspeakable crime when he attacked two defenseless young children for no reason, killing one and leaving the other seriously injured,” Gonzalez said in a statement. “Today's sentence ensures that he will not be able to harm any other innocent people. I know that PJ's loved ones will never be consoled and that Mikayla, whose courageous testimony helped to obtain this conviction, will forever carry this tragedy with her. But I hope that they will find some solace by knowing that justice was done."

St. Hubert still maintains he's innocent, saying he never killed anyone. He says everyone is out to get him, even in prison.

"I'm not no criminal, says St. Hubert. "I'm a good guy."

St. Hubert's attorney Howard Greenberg plans to file an appeal, saying his client didn't get a fair trial.