Accidents being investigated on public property are not necessarily criminal either. However, LA R.S. 14:99 states that reckless operation is the operation of any motor vehicle, aircraft, vessel or other means of conveyance in a criminally negligent or reckless manner. Because this is a criminal statute, it is applicable everywhere, including private parking lots or private roads.

Insurance laws also apply, even on private property. If the person were found to be without insurance a law is broken. Although the officer cannot issue citations to the drivers for moving violations such as speeding, the officer can still take action against a driver for not having liability insurance.

Police officers just don’t like to investigate private property accidents. They actually have private lot crash reports, which is a different, less detailed report than the Louisiana Uniform Motor Vehicle Crash Report that L.E. prepares when a crash occurs on a public road.

These cops were being lazy or just didn’t want to be of assistance. Simple as that. Even though they know many insurance companies will challenge claims without an accident report.

Now Google "criminal negligence" and see how that applies to a fender bender in a private parking lot.

What action could the police take if the driver was found to not have insurance? Which in this case there was insurance.

Police do not "investigate" private property crashes unless criminal violations, not traffic, warrant it. Any report that may be prepared are only a courtesy for the drivers and insurance companies.

You said they are lazy and didn't want to be of assistance. Yes the police could have responded and assisted in the exchange of information and if the situation had escalated to a disturbance they would have to respond. But other than stand there and tell grown-ups how to handle their business, they would do nothing else. They probably didn't have anything better to do anyway.