Alaska Governor Sarah Palin, the running mate for Republican presidential candidate John McCain, wrote emails that harshly criticised Alaska state troopers for failing to fire her former brother-in-law and ridiculed an internal affairs investigation into his conduct.
The emails, never before made public, were shown to The Washington Post by a former public safety commissioner, Walter Monegan, who was fired by Mrs Palin in July.
The bipartisan Joint Legislative Council has called for an investigation into Palin's potential abuse of power and controversial firing.
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