Boston Blinds - Theft at premises with polygraph tests failed.

Years ago i used Boston Blinds. We had a few people working in my house or atleast it seemed that way to the two installers...but it was my grandfather and uncle who doing a few things. Unfortunately my mom in law left these two alone in my house. We returned from work and found some jewellery missing. I immediately knew it was them and took them for a polygraph test (they are also cousins) They failed the test horribly but the policeman was not interested and cared more about what the lady owners feelings as she had just purchased the business and got these guys with it 3 months prior. She knowingly allowed thieves to work in peoples homes thereafter. I still have the tests. After speaking to the head of their station she said the policeman was wrong not to even take the guys in for questioning.