1.   Police had to wait for backup to arrive before making any arrests.

2.   The officer waited for backup to arrive before making any arrests.

3.   But backup soon arrived.

4.   When police backup arrived, however, and Guidice tried to arrest Rivers, he resisted.

5.   Police backup arrived, as well as troops from the NATO-led international peacekeeping force deployed in Bosnia.

6.   The officer who stopped Hardaway had asked for backup, and the policy is for requiring a driver to stay in the car until the backup arrives.