Maraj, who long denied the allegations, was tried in Nassau County, New York. A stoic Maraj showed zero emotion as he was convicted of predatory sexual assault against a child and endangering the welfare of a child.
The first sexual assault occurred in April 2015, just before the victim's mother married Maraj in a $30,000 ceremony paid for by Minaj, officials charged.
'We hope that today's verdict will help the family in the healing process, ' Nassau County D.A. Madeline Singas told TMZ.
Maraj's famous sister Nicki was not in court for the trial and she was not called as a witness to corroborate the blackmail plot, as had previously been suggested. The girl testified that Maraj treated her as his own daughter before he began raping her.
The girl said Maraj also threatened that she would be taken away from her mother if she told anyone about the abuse.
The fate of Nicki Minaj's brother has been placed in the hands of NY jurors as they deliberate over charges alleging he raped his stepdaughter.
Minaj has not spoken on the verdict.
"The amount of evidence that we had that wasn't allowed in this case is unbelievable", the Garden City lawyer added. Maraj would molest the girl when her mother (his then-wife) would go to work. If she refused his advances, he physically attacked her, she testified, according to Brosh. A scientist testified the DNA was a 1 in 291 billion match to Maraj.
James R Ray III, a civil attorney who briefly represented the mother, testified that he did demand a $25m legal settlement from Jelani Maraj after he had been arrested, but said the girl's mother was unaware of the demand. The woman later fired him as her attorney. Sentencing is to take place December 14.