Oops is, yet again, a legal term

Jeremy Roebuck has an article in The Philadelphia Inquirer about a poorly-coached witness:

A loose-lipped witness nearly derailed the racketeering retrial of Joseph Ligambi (center, in photo, above) during testimony by referencing the government's previous attempt to convict the reputed Philadelphia mob boss.
Defense lawyers called for a mistrial after Joseph Procaccini, owner of a South Philadelphia video poker machine company, was asked under cross-examination whether he knew of a relationship between Ligambi and mob bookmaker Gary Battaglini. "I know Gary was convicted in the first trial," Procaccini responded.
A Federal jury found Battaglini and two other mob associates guilty of racketeering conspiracy in February of 2013 but deadlocked on the same charge when it came to Ligambi and his nephew and purported consigliere, George Borgesi. Prior to the start of their retrial last week, US District Judge Eduardo Robreno barred any mention of the previous proceedings before the new jurors.
Rather than let the slipup force yet another trial, Robreno called the panel back after fifteen minutes of legal wrangling and instructed members to disregard the reference.
Still, the incident offered jurors their first hints of the four-month, fourteen-defendant marathon that was Ligambi's first go-round in federal court.
Then, many of the men implicated by witnesses, including Battaglini, mob capo Anthony "Ant" Staino Jr., and underboss Joseph "Mousie" Massimino, sat beside Ligambi and Borgesi at the defense table. Staino was sentenced to eight years in prison in July of 2013, after pleading guilty to three counts of conspiracy and illegal gambling. Massimino received a fifteen-year sentence after his conviction.
This time, though, as witness after witness has outlined dealings with the lower-level mobsters, few have made mention of the two men on trial. Procaccini's testimony offered one of the first direct links. He told jurors that Staino, Massimino, and Ligambi edged him out of the South Philadelphia video poker market in 2001 by forcing him to sell his business. The three set up their own company, JMA Video Poker, so the deal would appear legitimate, prosecutors allege.
But what Procaccini viewed as a shakedown, Ligambi saw as just business, said Edwin Jacobs Jr., lawyer for the reputed mob boss. JMA paid Procaccini three thousand dollars for each of his gambling machines located at bars, coin laundries, and bodegas around South Philadelphia.
Ligambi, 74, and Borgesi, 50, deny any involvement in the illegal gambling, loan-sharking, and bookmaking operations of their mob fellows, and have repeatedly disputed prosecutors' characterization of them as men who muscled their way through business with threats of violence.
Testimony is to resume next week.

Rico says that these wise guys have got the 'who, me?' act down perfect...