In 1982, the two men began cooperating with the investigation.

We have, in fact, already begun cooperating with individual countries.

At that time the bank first became aware of the problem and began cooperating with the investigation.

Encouraged by the health department, the medical staff at the hospital finally began cooperating more fully.

They were moving toward the bathroom, said the witness, who began cooperating with the government days after the attack.

The clerk was arrested and began cooperating with the authorities.

The resolution succeeded: Iraq began cooperating with arms inspectors late in 1992.

He began cooperating with the authorities, apparently to gain favorable treatment.

Both men began cooperating with investigators after they were caught participating in such schemes.

He also began cooperating with the government, but he later reversed that decision.