Nicki Minaj's brother was just sentenced to 25 years to life in prison following the guilty verdict in his child rape trial.Judge Robert McDonald sentenced Jelani Maraj in a New York court Monday ... several months after the verdict been reached.As we reported ... Maraj was found guilty of predatory sexual assault against a child and endangering the welfare of a child in a trial that lasted less than 3 weeks. At the time of the verdict, the Nassau County D.A. told us, "We hope that today's verdict will help the family in the healing process."Back in 2017, Nicki visited her brother while he was locked up. We were told she only went to support her mother.TMZ broke the story ... Nicki never testified during the trial -- despite claims made by her brother's defense team that she would.