Police offer $25K reward for serial killer's gun
KTVI - "The weapon, a long barrel semi-authomatic 22 caliber pistol known as an Erma Werke ET-22. Police are asking gun collectors and dealers to notify them if they see such a weapon, or had one stolen in the early 1990s."

via KTVI:

ST. CHARLES, Mo. -- (KTVI) -- Police are asking for your help to find a gun used in at least six murders. They are offering a $25,000 reward for information leading to the arrest or conviction of a serial killer.

St. Charles City Police are still looking for the man who killed a young woman 24 years ago this May. He used a most unusual weapon that has been linked to five other murders. All along Interstate 70 in April and May of 1992.

The crime happened in the Boot Village Shoe store in the Bogey Hills Plaza on Zumbehl road at I-70. It was one of a series of murders that stretched from Indianapolis to Wichita, Kansas during the spring of 1992.

FULL STORY: Police offer $25K reward for serial killer's gun - KTVI