We've dedicated ourselves to creating some awesome costumes to help you live out this fantasy, including police officer costumes for adults. Wearing a police Halloween costume lets you dress up like a cop, even if it's just for the party. This particular version helps you keep cool and comfortable, since it comes with a pair of shorts and a. Rubies Police Officer Adult Costume. Rubie's. $ reg $ Sold and shipped by Pure Costumes. a Target Plus™ partner. Choose options. Underwraps Costumes Police Adult Costume Fitted Shirt.