A staged wedding to bust dealers
As supposedly reported on CNN:

Undercover police, staging the wedding of "a drug kingpin's daughter", let it be known on the street that dealers were "invited" (i. e. Expected to attend).

The bride and groom were police, as was the band, bartender, and about half the guests. The band playing at the wedding was "S. P. O. C." (COPS, backwards), and the wedding went through the full ceremony, including the dancing afterward.

The long-sought dealers were arrested after the "band" took their break. The last song the band played before taking its break? "I Fought The Law, And The Law Won"

Bad Investment
Shultz, a lawyer, bribed a man on the jury to hold out for a charge of manslaughter, as opposed to the charge of murder which was brought by the prosecution.

The jury was out for nearly a week before they returned to court with the manslaughter verdict.

When Shultz paid the juror, he asked him if it had been hard to persuade the other jurors to get the charge of manslaughter.

"Sure did," the juror replied, "all the others wanted to acquit him."