The enemy base used crows to communicate, only the crows that were useless were left to die in cages or killed. (You were one of those crows, only you could transform into a human)

The TF141 knew it and they didn't like that. Roach was training alone until he saw something fall on the ground, he reached out and saw what it was.

An enemy crow..... Tied up by its beak and legs with a letter on the ropes of its legs.

Roach grabs the crow and goes to Price and says, "Price, I found an enemy crow..." Gaz and Soap look at him and approach