you may want to reform your topic to "was king tutankhamun murdered" since so many scientists/archeologists have found evidence to support that he was not murdered.
This way you can still talk about Ay (main suspect at the time when everyone thought he was murdered) and whatever else you want to about the subject, but still be as scientifically correct as possible. Or rather... as correct as possible on a culture thousands of years past
ps. you may find this article interesting
http://www.sciencedaily.com/releases/20 ... 163332.htm
hope that helps some; good luck!