The Trojans also sent out a spy named Dolon.  Odysseus and Diomedes saw Dolon and hid amongst the corpses beside the path.  They cut him off from his army and chased him down.  Pinned and crying Dolon begged for his life and offered a ransom for it.  Odysseus assured the man that he was in no danger.

Dolon told them there were no sentries posted around the Trojan camp and that the newly arrived Thracians were in an isolated place, separate from main body of the army.

Diomedes cut off Dolon's head.  They stripped the corpse and Odysseus held the plunder up to Athena and prayed to her for success against the Thracians.