It is possible that indian agents or maoists are behind police killings. Violence can never be the answer. Madhesi leaders who are calling threatening the families of police living in madhesh should have been arrested. Amresh Kumar Singh should have been disciplined. Government should have been serious to protect police. But Bam Dev Gautam or Sushil Koirala care THE LEAST. Injured police in "Tikapur" were complaining against the higher ranked officials for being ignored and being neglected for several hours for treatment. Everyone was talking about only SSP, and news of those injured and lower ranked official were hardly being shown by the media. Here is the youtube video of police beating I was talking about, but not all police are bad. See, how one police tries to protect the beating from his own fellowmen.

https://youtu.be/PB-fohY_dvk