The ending is f@cking ridiculous ... (spoilers)
and ruins an otherwise very good film.
There would be multiple investigators involved, police supervisors, multiple police agencies, probably the FBI once it became an "abduction" case, the District Attorney's Office. Analysts would be pouring through cell phone, internet information. People would be where is this data, where is that data, why don't we have this yet?
One corrupt investigator would not be able to thwart an investigation by pretending that certain things had been done.
This derailed the movie for me.