Controversies
Controversies tied to this brand in public sources. A listing is not a finding of fault.
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2006
DNA exonerations exposed possible wrongful convictions
DNA-based releases, including Bill Dillon's, demonstrated that cases relying on Preston's testimony could produce wrongful convictions and prompted renewed scrutiny of Harass II-related evidence.
1984
Failed Brevard County tracking demonstration
Harass II failed a judge's controlled tracking test, while Preston did not remain for a second opportunity. The episode became a central challenge to the credibility of his courtroom claims.
1983
Alleged handler cueing and manufactured tracking results
A Postal Service investigation alleged that Preston knew the result sought by investigators and guided Harass II toward it, calling into question the independence of the dog's tracking performance.