We’ve posted before about “dog scent lineups.” See those posts here and here. They’ve been called “the worst of the junk sciences.”
I can do naught but shake my head. I thought we had seen the last of it, but this stuff is still going on. In Maricopa County, AZ, not one, but two, people were charged with setting their own houses on fire, based upon bogus dog scent evidence which was solely the result of unethical conduct by the Phoenix Fire Department investigators involved. An independent, professional fire investigator confirmed without question that the fires were NOT arson. The charges against both were eventually dismissed, but not before one of them spent 16 months in jail.
See the aol.com Inside Edition story here … it should make you angry.
And here’s the kicker. Despite the recommendation of six felony charges, the prosecutor declined to bring any charges against the dishonest fire department employees, and they are both still employed by the department.
Looks like the “good ol’ boy” network is alive and well in Maricopa County.
Wrongful Convictions Blog 
And by the way – if you want to use dog scent “evidence,” put the dog on the stand, swear in the dog, and let the dog testify. Then let the dog be cross examined.
Scott Peterson was convicted using dog scent evidence of doubtful reliability. The State recently responded to the filed appeal, and claims “Overwhelming evidence, independent of the dog scent evidence”, which is however also doubtful. For details on the dog scent evidence (tkane from the appeal), see here https://geebee2.wordpress.com/scott-peterson/dog-scent-evidence/