How did George Washington find out Benedict Arnold was a traitor?

Answer:
When he received word that Benedict Arnold was going to willingly surrender West Point to the british. When George Washington learned of this, he and his men moved toward West Point and Benedict Arnold being the cowardish traitor that he was.......ran.
Contributor: GiLLiGaNN
First answer by GiLLiGaNN. Last edit by GiLLiGaNN. Contributor trust: 9 [recommend contributor recommended]. Question popularity: 1 [recommend question].