Because quite frankly, you never know what type of criminal records history the person has until you perform a detailed background check on the individual. However, you should be informed that you do have options when you want to find out what is behind someones criminal records.
The first option you have is to go to a local court house to request for their criminal records. This can be very time consuming because you'll initial need to get a clearance which can take weeks. And after you are cleared you will be given access to their vaults with tons of boxes of files to sort through. You should also be aware of the fact that you will have to repeat this process for every single county the individual has visited and lived in. And this can be quite a time consuming task to get someones public records that way when you think about it.
And thankfully with the technology we have nowadays, you can have instant access to a persons entire criminal background check history by simply going to http://criminalbackgroundchecked.com/