A conviction on the more serious charge could result in a prison term of five years to life.
Three convictions would result in permanent loss of the license.
The trial had prompted fears a conviction could result in violence.
Conviction may result in fines, suspension or removal for life from the union.
Most convictions now result only in probation, so prosecutors are reluctant to take on such cases.
Any conviction on civil charges can only result in financial penalties, not a prison sentence.
He said his concern would be making too generous a deal, too early, when a conviction might result from waiting.
If a conviction or confession resulted, the caller got $10,000 in $20 bills, no questions asked.
The standard for requesting a special prosecutor was also changed, he said, to include a consideration of whether a conviction would likely result.
Conviction may result is fines, suspension or expulsion for life from the union.