Aug wrote--
 
> These days, the police can charge someone for distracted driving  
> if they can assume the person was using/glancing at a detached  
> phone. 

  In WV using a hand held phone is a secondary offense.
  Its not enforced to any great deal.  People aren't being pulled over all
over the place for being on their phone.  

> phone is detached, whether a call was in progress at the time of  
> accident, etc.

   That would be easy to trace since all call times are recorded.  
   They could also check the times the phone was in use before and after
the accident, if an emergency number (calling for help after an accident), or
otherwise.
   Joe