A FiveM law enforcement setup is not one script, it is four layers that have to agree on the same data. The police job handles duty, arrests, cuffing, fines and loadouts. The EMS job handles revive, treatment, hospital and death state. The MDT (mobile data terminal) is the database UI for citizen lookups, reports, warrants, BOLOs and charges. Dispatch turns in-game events like shots fired or a stolen vehicle into alerts and blips for on-duty officers.
The hard part is not picking any single script, it is making all four read and write the same citizen, charge and evidence records. When the job, MDT and dispatch come from different authors they often store data differently, so a charge filed in the MDT does not appear in dispatch, or an arrest does not update the record. That mismatch is the number one reason police roleplay feels broken on a busy server, and it is why single-vendor stacks built on a shared data model behave more predictably than a pile of mixed free resources.