Prescott Valley Police Department issued an alert Monday after the police chief left his weapon in the restroom of the local library.
The department is asking for help finding it, AZ Central reported.
Police Chief Bryan Jarrell changed clothes in one of the restroom's stalls after a town council meeting Nov. 9, but it was four days later before he realized the firearm was missing.
Authorities say Jarrell accidentally left his gun in the restroom stall.
What type of firearm?
The alert is asking for help in locating the missing 9-mm Glock 19 with a serial number of YHC 944, according to KNXV-TV.
When did he report the gun missing?
Jarrell reported the missing weapon Nov. 13, as soon as he realized it was gone, according to AZCentral.
If someone finds it, who should be contacted?
Anyone who has information about the gun should call Prescott Valley Police Department at 928-772-9267.
Police also reported the gun's information to the National Crime Information Computer.