cooperator

He pleaded guilty and became a government cooperator — and, all that time, his wife waited for him in Pakistan.

"He is not a viable cooperator for the Fulton County D.A.,"

Some models were designed to create a vortex, which, through its shear pattern, localized cooperators within a ring while pushing cheaters to the outer rim of the environment -- essentially localizing cooperation.

Second, cooperators will be credited as profiles in courage ready to take on political risk to restore a functional government.

While Wang is the first cooperator to take the stand, jurors have so far heard from three other witnesses.