Mordchai Fish, born around 1953 in Brooklyn, New York, is a prominent Orthodox rabbi from the Borough Park Jewish community and the former Chief Rabbi and principal of Congregation Sheves Achim in Brooklyn. He operated a yeshiva that provided services for mentally disabled children, a factor often cited in his defense to highlight his communal contributions. Fish gained significant notoriety for his central role as a coconspirator and principal rabbi in the federal corruption investigation known as Operation Bid Rig III, where he directed cooperating witness Solomon Dwek to use Goldhirsh's gemach account and to Weber's office to obtain cash. He was involved in a sophisticated money-laundering network that utilized Jewish charitable organizations, known as gemachs, to conceal the origins of illicit funds. As the brother and primary co-conspirator of Rabbi Lavel Schwartz, who was also implicated and pleaded guilty in the same scheme, Fish controlled the gemachs used in the laundering ring and had access to them for laundering purposes. Between early 2008 and mid-2009, he coordinated approximately 15 transactions with Dwek, laundering nearly $900,000 in checks into over $800,000 in cash while retaining a 10% fee, believed to be derived from bankruptcy fraud, counterfeit goods trafficking, and bank fraud. In this scheme, he conspired together with others, including Moshe Altman (also known as Deutsch), to launder funds through the BGC gemach, with Rabbi David Spira acting as the physical intermediary, receiving cash deliveries at his bakery; the operation also utilized purported charities like Boyoner Gemilas Chesed, Beth Pinchas, CNE, and Levovous, with cash distributed via an underground network possibly extending to Israel. Fish had a prior federal conviction in 2001 for bank fraud in Brooklyn, resulting in several months of home confinement. In 2009, he was arrested as part of the Bid Rig III sting operation targeting public corruption and money laundering networks. On April 8, 2011, he pleaded guilty to money laundering conspiracy. On July 3, 2012, he was sentenced to 46 months in federal prison, three years of supervised release, and forfeiture of $90,000, with the court noting his abuse of his position of trust within the religious community, the operation's sophistication, and his failure to learn from his previous offense. During sentencing, Fish expressed remorse, citing manipulation by the informant Solomon Dwek. His case highlighted vulnerabilities in religious charitable networks to financial crimes, though post-conviction details are limited. As part of the conspiracy, cash was supplied to Fish. He is a convicted money launderer in Operation Bid Rig.