Cop Block (or copblock)
Cop Block (or copblock) ©® is a thing which blocks your vision, as like the thing which undermines a criminal's vision is a cop; and also, an individual, group or other person, place, thing, event or idea which runs interference with police, while one or more gets away.
The PD cop block (or copblock) everything I do so I have to send a cop block (or copblock) to run interference.