Ignition Interlock Device firms successfully use CaseHunter’s legal leads to target defendants that have been charged with a Driving Under the Influence (DUI) or Driving While Intoxicated (DWI) crime. Most states mandate the use of an ignition interlock device as part of the defendant’s conviction. By using direct mail marketing to target these defendants, you can ensure that the defendants select your firm when procuring their ignition interlock device.