The Board of Immigration Appeals has determined that a single attempt to report an incident of harm by private actors to local police, without further harm from the police themselves or evidence of their widespread collusion with alleged persecutors, does not establish that the government, as a whole, is unable or unwilling to protect a respondent from persecution.
The full text of Matter of K-S-H- can be found here: https://www.justice.gov/eoir/media/1417811/dl?inline