Ann Arbor police saw their officer ranks drop by 31 percent from 2003 to 2011, but crime also fell during that period.Courtney Sacco | AnnArbor.com Violent crimes increased in the Washtenaw County Sheriff’s Office jurisdiction despite the number of deputies growing by more than 7 percent from 2003 to 2011, statistics show. The increase in crime comes with an influx of more than 10,000 new residents, according to statistics from the Federal Bureau of Investigation.