The Ridgefield Police Department is asking that residents take steps to prevent becoming the victim of a Catalytic Converter theft.  Police say the thefts have occurred any time, day and night, and it only takes a few minutes.  Anyone who sees something that looks suspicious or out of place is urged to call the police and report the activity.  The exhaust emissions devices can cost thousands of dollars to replace and are a target nationwide due to the high cost of their precious metals.  Prevention tips include parking in a well lit area, having the vin number etched into the catalytic converter, or using a bright anti-theft spray paint on it.