I had the same problem. At the time, I was using the Ragehook version that came with 1.0d, and the plugin crashed upon attempting an arrest. In fact, I've been having all sorts of problems with this version, so I'm going to wait for a more stable version, although this version is very stable for an initial release. I hope it doesn't have to do with my tech specs, because GTA V runs fairly well on my rig.
I've updated to the newest Ragehook but I haven't been able to get the script to function properly to test the arrests.