Which Guide Lied

Every Girl Guide promises to do her best and the members of the Griffin Patrol are certainly no exception.
 
This patrol is famous for their fun activities and camaraderie and its members headed out on the current camping activity certain that a good time would be enjoyed by all.
 
And everyone was having a good time…until Peg Puller didn’t show up when the dinner gong sounded. She was discovered in her tent…dead! 
 
Who had killed Peg Puller?
 
Which Guide lied?