The founder of an Indianapolis medical facility said Monday that a former unpaid student intern who claimed Peyton Manning used a banned substance in 2011 didn't even work at the clinic until two years later, long after the NFL star was undergoing treatment. Dr. Dale Guyer, who started The Guyer Institute, said the allegations against the Denver Broncos quarterback are untrue. Manning angrily denied using performance-enhancing substances shortly after the Al Jazeera report went public Saturday. More...