If u know someone in the law enforcement
 

is it possible they can make a fake case against u via through their database?

I have several friends that are police officers.

In theory, there are a few ways they could make a fake case against you. The first option would be that they arrest you on fake charges and either plant evidence or simply claim they saw you committing a crime. If the evidence and/or their testimony held up you could then be charged and convicted of the crime. The other option would be similar in that they would have to write you a ticket for some offense. If the ticket held up it would go on your record and be in their system. If they ticketed you a few times for the same offense it could show that you have a history of committing that crime.

As far as them entering your information into a database of sorts the only other real option would be if you were a suspect in an active case, but that database likely wouldn't be wide spread and available to every cop out there.

In end 99.9% of cops aren't going to bother doing any of this. The reason is they are not going to risk their career to catch a criminal. They understand that most criminals are idiots and they will eventually do enough to get caught and put away by normal, regular means.

Trust me... 99.99999999999999% of cops could care less about fucking you in an elaborate scheme that could in fact get them federally indicted. And most of their databases are tracked and logged pretty thoroughly so there is a paper trail. And if you're that scared you should quit fucking with the cop you're nervous about.