Plano (WBAP/KLIF) A well known Plano police officer is back at work after coming down with the coronavirus. David Tilley is the Public Information Officer for the department and says he was exposed to the virus late last month. Tilley was on his way to his son’s wedding in Colorado when he found out he was in contact with someone at the department who had the virus. He later tested positive himself. Tilley missed the wedding, but is back on the job after recovering and testing negative twice. He had a mild case of the disease and says he now plans to donate plasma to help other people suffering from the virus recover quicker.