Sonoma County's felony-arrest conviction rate dropped during District Attorney Jill Ravitch's first year in office but rebounded in the next 12 months, rising to the highest level in at least 10 years.
Statistics from the state Attorney General appear to paint a bright picture for Ravitch, who was elected in 2010 on her reputation as a tough trial lawyer.
After slipping to a three-year low of 66 percent in 2011, the conviction rate for those held on the most serious charges climbed to 70 percent in 2012, exceeding predecessor Stephan Passalacqua's high of 69.5 reached in 2009.
The increase, which surpassed the statewide rate of 68.5 percent, can be interpreted as a sign that Ravitch is being more selective about what cases to pursue. But whether the numbers add up to courtroom success is unclear.
Legal experts said the only true measure is trial convictions, which Ravitch has not released.
"Anything that points toward improvement is good but we can always do better," Ravitch said.
Overall, the number of felony arrests referred to the district attorney has declined.
In 2012, 4,866 people were held on felonies, a decrease of about 14 percent from the year before.
At the same time, Ravitch's office appears to have been more discriminating about choosing the cases to prosecute. Prosecutors rejected 13 percent of the cases in 2012.
By comparison, Passalacqua's office rejected 9 percent during his last year in office in 2010. The year before, he rejected 7 percent.