Sorry, I explained it incorrectly. It doesn't replace it or anything, but as stated by Echooo in the "Improved Ai Accuracy mod", changing the pedaccuracy.meta file to make AI less accurate has no effect on the AI's accuracy whilst Deadly Weapons is enabled ("NOTE: This mod likely will not have any effect if you use deadly weapons (at least as far as I can tell) because deadly weapons has its own built in accuracy system, however there shouldn't be any compatibility issues if you still choose to use deadly weapons in combination with this mod.").
There's a few mods that change the pedaccuracy.meta file, in order to make AI less accurate, as in you won't get precision killed while going 60 mph in a vehicle. However, it seems DeadlyWeapons overrides that .meta file. Any chance for that to be a toggle in the future?
In case you haven't fixed it by now:
Personally, I fixed the issue by loading the plugin after going on duty through the RPH Console F4-> LoadPlugin CopHolster ....
Also what I did was disable the command line in the lspdfr.ini in the Grand Theft Auto V -> lspdfr directory and setting Ambient.DisablePlayerHolsteringActions = false
Good Luck!