beagle (n.)

• bailiff
• beadle
• captain
• commissioner
• constable
• deputy
• detective
• dick
• eye
• fed
• federal
• flatfoot
• gendarme
• gumshoe
• hawkshaw
• inspector
• lieutenant
• marshal
• narc
• officer
• patrolman
• policeman
• policewoman
• reeve
• roundsman
• sergeant
• sheriff
• sleuthhound
• spotter
• superintendent
• tec
• tipstaff
• trooper