You can sell empty laserjet printer cartridges to ink recycling stores. These facilities also can refill your ink cartridges for half the price of a new cartridge.
First, umpty the bedding, then fill it with water and/or wipe it down with a wet paper towl/cloth.
If you mean: how reliable is the information you hear on a police scanner, then fairly so, though it's possible the people are relaying untruthful information given to them by an unreliable third party or reporting their (possibly mistaken) impressions and observations of the moment. It's also just barely possible that someone might actually intentionally lie ("He shot first."). If you mean: if a police scanner says the frequency is umpty-ump point whatever megahertz, how likely is it to actually be that: pretty darn dependable, unless you've got some sort of cheap crummy scanner.