Once upon a time, a cop could deploy a nightstick. A taser is a really poor close quarters melee weapon. When things are happening fast at close range, swinging a nightstick was non lethal, but often brought permanent damage to the recipient of blows, which brought lawsuits, which led to their being largely dropped from police usage. A taser just doesn’t replace it from what I can tell.
If that is what you want then stop issuing guns; once the cop is responsible for it, he has to protect it. Read about Thomas Trantino and the murder of two cops in the 1960s in NJ; without going into detail, the story will stop any cop from losing his gun.