Black leather briefcase with laptop sleeve

I found a black leather briefcase this afternoon around 2:15pm in the parking lot behind the Allentown Public Library on N 7th Street, here in the Lehigh Valley. It's a medium-sized case with a single zipper, a worn scuff on the front corner, and a padded laptop sleeve that fits a 15-inch laptop. Inside the main pocket there's a yellow Post-it with the initials 'A.R.' and a blue USB-C cable tucked next to a stack of business cards. There's a brass key tag on the outside handle engraved with 'BR' and a faint leather smell that still feels new. If you recognize it, I hope we can get it back to its owner soon.