Mobster was fed informer

A former Russian mobster convicted in the gruesome 1995 slaying of a Brooklyn boxer helped the feds secure the conviction of a banker accused of fraud, according to new papers filed in the Manhattan federal court case.

The former gangster, identified by defense attorneys as convicted murderer Natan Gozman, worked with the FBI as a confidential informant in a financial-fraud case against former bank manager Herode Chancy.

Chancy pleaded guilty in March of conspiring to fraudulently obtain business loans of more than $1 million and to not repay them, prosecutors in Manhattan federal court said.

But in a sentencing memo filed earlier this month, Chancy’s attorney argued Gozman set him up to engage in the bank fraud — and worked with the feds while he needed cash to pay back some $70,000 in defaulted loans.

“The scheme never could have happened without Gozman, who coached Mr. Chancy at length on how to make the fraudulent applications,” wrote Chancy’s attorney, Clay H. Kaminsky.

“He told Mr. Chancy exactly what to do and how to do it,” he added.

Gozman denied organizing the fraud to entrap Chancy.

“Nobody set nobody up,” he said.