Guns, drugs and money were found by officers during a home check.
It's unknown who police arrested and how they found everything.
When they searched their vehicle, they found 48 grams of crystal meth and a powdered substance containing 42 grams of suspected fentanyl.
The German Short-haired Pointer joined the force earlier this year after donations helped get him on the force.
Nelson County sheriff's deputies were called to a Dollar General store on the report of a suspicious car, only to find meth and heroin.
The Chicago branch of the DEA said it is the largest meth seizure ever in the area.
The narcotics unit continues to investigate the bust.
The dogs are part of an effort involving LMPD and Customs and Border Protection at the Express Consignment Operations Hub.
After obtaining search warrants in Louisville, Elizbethtown and Radcliff, the narcotics team was able to search the DBA Couture Clothing Store locations in Louisville and Elizabethtown.
Three suspected drug dealers are behind bars in Hardin County after police wrap up a year-long investigation.