1. (noun) a detective who follows a trail

• sleuth

2. (noun) a breed of large powerful hound of European origin having very acute smell and used in tracking

• bloodhound

1. (noun) a detective who follows a trail

• detective

2. (noun) a breed of large powerful hound of European origin having very acute smell and used in tracking

• hound
• hound dog

1. (noun) a detective who follows a trail

• sleuth
• snoop
• spy
• stag