U will have a better chance when applying for police since you under go siilar training like law, apprehension, security, protection, dog training...As for selection of MP, strict criteria. IPPT, criminal records, personal backgrounds and good paade drills are some of the considerations which will earn you a place for interview.Through interview willl decide who goes for MP training. Showing signs of doubt or less interest will not be considered. MP training is one of the highest OOC rate I had heard of... thereforer only the best will pass out as Military Policemen..