Originally Posted by Fr_Chuck
yes several issues, first at 40 you are over the age limit for many of the Federal law enforcement jobs. And you did not say what jobs you sent resumes to. If police departments, resumes don't work, they throw them away, you have to do a formal application process including written testing and the such. The same is true with the prison systems.
So tell us what you are looking at already and we may have some additional ideas.
As for as a PI, depends on your state, in some states, you will have to get a few years experience before you can be licensed on your own company.