Chautauqua County (NY) Law Enforcement

Each department has a letter prefix.  
A partial listing follows:

CX	Sheriff
EL	Ellicott PD
J	Jamestown PD
SC	Silver Creek PD

SHERIFF AND JAMESTOWN PD CODES

10- 1  Unable to copy
10- 2  Relay to -----
10- 4  Acknowledge
10- 5  Change frequency
10- 6  Busy
10- 7  Out of service
10- 8  In service
10- 9  Repeat
10-10  Detail (available)
10-11  Remain in service
10-12  Assault
10-13  MVA
10-14  Miscellaneous accident
10-15  Bad road condition
10-16  Youths annoying
10-17  Burglary
10-18  Call by phone
10-19  Disorderly person
10-20  Location
10-21  DWI
10-22  Alarm
10-23  Family trouble
10-24  Fight
10-25  Fire
10-26  Hit & run
10-27  Holdup
10-28  Vehicle registration data
10-29  Record check
10-30  Suspicious condition
10-31  Larceny
10-32  Trouble at station
10-33  Bomb threat
10-34  Man with weapon
10-35  Ambulance needed
10-36  Escort or convoy
10-37  Prowler
10-38  Meet an officer
10-39  Wanted or escaped
10-40  Purse snatcher
10-41  Notify Coroner
10-42  Shooting
10-43  Shoplifter
10-44  Pick up package
10-45  Stabbing
10-46  Tow truck needed
10-47  Breathalyzer
10-48  Suspicious person
10-49  Traffic problem
10-50  Return to station
10-51  Injured or stray
10-52  Prisoner's meals
10-53  Officer needs help
10-55  Turn on gas pump
10-56  Turn off gas pump
10-57  DEC violation
10-58  Prisoner transport
10-59  Advise phone number
10-61  On location
10-62  Drowning
10-63  Boat in distress
10-64  Illegal snowmobile
10-65  Clear for message
10-66  Clear for cancel
10-67  Starflight
10-98  Assignment complete
10-100 Riot

With thanks to NF2G.com