The fundamentals of fighting are the same no matter what though. There is stand up, clinch, and ground. There is striking, grappling (including joint locks, chokes, etc.), dirty tactics, and weapon use and defense. There is nothing more than that. The key is that all areas must be trained, and trained well. The MMA Base is ideal for training, because you learn to use all techniques in all ranges against a fully resisting opponent. But you have to add the dirty tactics and defense against them, and you have to add weapon use and defense. So in that sense what I taught cops was the same as what I taught everyone. But in terms of specific techniques to take someone down rather than injuring them, adaptations need to be made. If you look at what I call the Smack and Hack for example, instead of using a knee and elbow after the fourth picture (or any other destructive option), you can use a bent arm lock (kimura) to slam the opponent to the ground. You can hold him, break his arm/shoulder, or cuff him. Most of these variations are in my first book…the throwing, joint locking, and choking options. When I taught police I just laid those options out as the first options for on the job.