Thomas Gioeli, Reputed Mobster, Is Convicted of Murder Plots A man whom prosecutors described as a high-ranking member of the Colombo crime family was convicted on Wednesday in Federal District Court in Brooklyn of plotting to kill six people, including a police officer. Yet the verdict was a mixed result for prosecutors: Thomas Gioeli, the prime defendant in the case, was acquitted of actually committing any of the killings, including the 1997 slaying of the officer, Ralph C. Dols. Another member of the Colombo crime family, Dino Saracino, who was tried with Mr. Gioeli, was also convicted of a racketeering conspiracy that included extortion, witness tampering, extension of credit and conspiracy to commit murder. He, too, was acquitted of several other charges, including the murder of Officer Dols. The men face up to 20 years in prison at sentencing. After the verdict was announced, Mr. Saracino appeared jubilant, hugging and thanking his lawyer, Samuel Braverman. Mr. Braverman said the verdict should send a message about the government's use of cooperating witnesses. "You can't trust somebody who ultimately is untrustworthy," Mr. Braverman said.