Black leather Tumi briefcase with red interior

I lost my black leather Tumi briefcase yesterday around 3pm outside the Allentown Public Library on Hamilton Street. It's a slim, medium-sized case, about 14 inches wide, with a smooth matte finish and a brushed chrome zipper, and a red interior lining I can spot easily when I open it. Inside there are my work notes, a USB-C charger, and a notebook with my initials AK stamped in gold on the inside pocket. There's a small nick on the lower-right corner and the leather strap shows some wear. This briefcase is essential for my job, and I really need it back.