A K-9 officer for the Oklahoma Bureau of Narcotics helps sniff out a major drug bust.

 K-9 Yeko is being credited with discovering more than 50 pounds of fentanyl being trafficked into Oklahoma this week. OBN says that amount of material is enough to produce a quarter of a million fentanyl pills that would have been sold in Oklahoma and elsewhere in the U.S. Authorities say fentanyl in those mass quantities usually comes from China into Mexico, then across the southern border where it is distributed via the interstate system.

Photo courtesy of the Oklahoma Bureau of Narcotics