Raymond “Shrimp Boy” Chow said he was a changed man after his last prison sentence for racketeering in Chinatown more than a decade ago. But jurors heard an undercover FBI agent, backed by tape recordings, describe paying Chow for illegal transactions with his underlings. And they heard former cohorts saying Chow had ordered two murders.

On Friday, after 2½ days of deliberations, the federal court jury in San Francisco found Chow guilty on all charges: conspiracy to operate a century-old community organization as a racketeering enterprise, murdering its previous leader, conspiring to try to murder another rival, five counts of dealing in stolen liquor and cigarettes, and 154 counts of money-laundering.

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“If you have tapes that are perfectly consistent with informant testimony, then juries convict a great deal of the time,” said Robert Weisberg, a Stanford law professor and co-director of the Stanford Criminal Justice Center. He said he was not surprised by the verdict and expects it to be upheld on appeal.