Summary of policies in question and alleged violations in the Jan. 30, 2012, pursuit as noted by S.C. Department of Public Safety experts:

1. Should disengage unmarked cars should when marked units are available: Primary pursuer at end, Lt. Ransom Williams, was in unmarked car that had passed marked cars.

2. Should factor in condit

ions: Pursuit should have ended because it was in heavy traffic and construction zone.

3. Should use lights and sirens, drive defensively, not indiscriminately disregard traffic signals: Williams failed to use due care by traveling for six minutes without a siren and reaching speeds of 133 mph. Deputy Shawn James reached 130 mph for one minute without a siren and failed to use due care when his SUV crashed into a deputy’s car at end of chase.

4. Should not drive recklessly: Williams failed to regard others’ safety by going 133 mph without a siren, which is also a law violation, and passed civilian and police cars in the median.

5. Should use only two cars and helicopter: More than 12 sheriff’s cruisers got involved.

6. Should assign supervisor to coordinate chase: Because agency head was involved, another supervisor should have commanded chase.

7. Should not follow on parallel streets: Multiple deputies drove parallel to the pursuit with limited or no contact with suspect.

8. Should use car with most prominent markings and lights: Williams’ car had no markings and no lights on top, though such cars were available.

9. Should end chase when its risks are greater than failing to catch suspect: Multiple pursuit vehicles at high speeds were a greater danger than a minor traffic violator.