There is a very good reason not to turn over her cell phone.
Does anyone remember the Jason Daniels Case. Jason Daniels was executed by Airport cop Richard Grisette. The district attorney  gathered all the evidence and then let Grisette see it before he was questioned.

There is every reason to believe that the information on Altshiler's phone would have been lost "by accident". 

She will prevail. The only question is, will the filthy trooper's name be revealed before a settlement is reached?