The gun was originally seized in 2009.
A shotgun seized by Gardaí 15 years ago ended up back in the hands of criminals.
The pump action shotgun was supposed to be in possession of Gardaí since it was seized back in 2009 in the east of the country.
However, last year Gardaí investigating a feud between two criminal gangs in the midlands seized the shotgun again.
Garda Commissioner Drew Harris has given a report to the Justice Minister and the Policing Authority.
A criminal investigation is now underway into how it left the control of Gardaí.
