Police records show speed-related accidents kill about 10 people every week in North Carolina, more than those who die due to alcohol.
Legislation has tightened the law on drunk driving, but has created loopholes in laws that were designed to put the brakes on drivers.
One woman had been caught driving too fast eight times, but wasn't taken off the road until she had an accident that killed a 76-year-old retiree.
Records also show that 80 percent of those charged with speeding are convicted of it and instead get a conviction for a lesser offense.
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