Found iPad linked to iCloud - What do I do?

My stepdad thinks a medical sales rep left an iPad in his office. it has been there for 4 months and no one has claimed or called about it. He tried to do a factory reset so that he could begin using the iPad, but it is linked to an iCloud account with Find my iPhone enabled. Is there a way to track the person down or to actually reset the iPad for use? Don't want to just throw out an iPad Pro!