In a court filing Thursday in Seattle, defense attorneys said prosecutors released excerpts from emails trying to make Harris-Moore appear callous and self-aggrandizing.
In the emails, the 20-year-old called the Island County sheriff "king swine," called prosecutors "fools," and referred to reporters as "vermin."
Harris-Moore's lawyers say the full emails show that he is sorry for what he did and thankful for the treatment he received from a state court judge in Coupeville who sentenced him to about seven years in prison.
He is expected to receive a similar sentence on Friday in federal court.
Authorities said Harris-Moore went on a two-year run from the law frequently stealing cars, boats and planes.
He earned the "Barefoot Bandit" nickname for allegedly committing some of the crimes without shoes.
He was captured in the Bahamas last July. In all, Harris-Moore is suspected of more than 70 crimes across nine states.
The Associated Press contributed to this report.
