How do I verify credit and background information?

[Karen Johnson]

Hello,

I got back a credit and background check for a potential renter via smartmove. Here is the feedback I got on the credit check (credit score itself was excellent and credit score was high):

Address submitted has been reported as suspicious. We suggest you verify the applicant's identity.
SSN may be invalid - it was either very recently or never issued by the Social Security Administration. We suggest that you verify the applicant's identity.
Address submitted has been reported as suspicious. We suggest you verify the applicant's identity.

How do I go about verifying this information further - in particular, the social security number? Is this standard jargon that I should expect even if the social is legit but has just been recently been issued? This person had a job for at least a year here, and has addresses going back to 2009.

Also, background check information shows someone with the exact same name with a murder conviction. From description and a small photo found online it doesn't seem like the same person but frankly it still creeps me out a bit. What can I do to validate further that it isn't him?

Thanks!!!