1.   Some think we are plainclothes cops.

2.   I always stay away from men wearing jackets in this warm weather, because plainclothes cops use jackets to hide their guns and radios and handcuffs.

3.   No, Strunk told the plainclothes cop, who was cunningly disguised in a Home Depot orange smock, he was mistaken.

4.   Watts made the mistake of reacting obscenely to two guys with guns, plainclothes San Francisco cops.