"
this young fool he just said to me it's liberty or death
and he looked a rather tasty one, I just could not help it
The young fool's name was Thomas Cox, and Pearce killed him when they had to cross a river and Cox couldn't swim very well. Admittedly, there's a good chance Pearce only brought him along as emergency rations anyway.
Pearce was found with pockets full of Cox's flesh and hung. His original crimes had been public drunkenness and stealing six pairs of shoes.