There are currently 17 Rank Ups and they occur when you reach the following Levels:
     "Level : Rank"
  • 1 : Officer
  • 5 : Deputy
  • 12 : Detective
  • 20 : Corporal
  • 32 : Sergeant
  • 45 : Lieutenant
  • 60 : Captain
  • 75 : Major
  • 100 : Inspector
  • 125 : Lead Inspector
  • 150 : Commander
  • 175 : Deputy Chief
  • 200 : Commissioner
  • 250 : Sheriff
  • 300 : Ranger
  • 350 : Marshal
  • 400 : Senior Trooper