(CNN) – Police in Wichita, Kansas are on the hunt for some very nimble offenders.

The culprits infiltrated the evidence and property room building in downtown Wichita and escaped with several ounces of marijuana.

In their stomach.

"This is just one of those situations where some were able to get in and get to the good stuff,” Lieutenant Doug Nolte, a 20-year veteran of the police department’s force, tells CNN's Erin Burnett OutFront.

Evidence custodians first noticed the missing contraband when they were sifting through evidence bins connected to cases from 2009.

The culprits appeared to have chewed through three evidence bags of marijuana to get to the substance.

But what exactly were the clerks doing in evidence bins from four years ago? FULL POST