You're running the wrong version of RPH for PoliceRadio to work and thus it's crashing
Exception type: System.MissingMethodException
[8/21/2015 3:29:56 PM.042] LSPD First Response: Exception message: Method not found: 'Rage.AnimationTask Rage.TaskInvoker.PlayAnimation(Rage.AnimationDictionary, System.String, Single, Rage.AnimationFlags)'.
You need RPH 0.22 for the latest police radio. but as always be mindful of the mods you use, as the difference between RPH 0.20 and 0.22 broke animations for most mods unless they updated to run with 0.22.