Hi there! I am not local to Baltimore, but I have found a national service I like a lot. With several properties in different areas, they have been able to offer clear and comprehensive tenant screenings for all of them. It's www.tsci.com. They offer local and national information, and you can pick to have the renter pay for the credit report, making the entire process free for you! Their online system is super easy to use as well.
Here's their latest blog article about attracting quality tenants to your property: