I've got no advice other than where the heck did you get a 5 week old GSD puppy?! They shouldn't leave their litter and mom until at the earliest 8 weeks!
A well bred, mentally balanced, properly socialized GSD should be able to work and be around people of all ages without difficulty. Hopefully someone else can chime in with more info.
Is the pup intended to be used as a police dog?!