“I’d demand a polygraph to make sure of it.”
Laff.
Why would the police think a polygraph is needed? They witnessed the husband holding the knife. What they saw matched the wife’s accusation. No county is going to spend $10K when their case is a slam dunk. Even if the husband took a private polygraph and passed it’s inadmissible in most jurisdictions.
Polygraphs are tools of the Prosecution. Counties only spend the funds on them when they need to narrow down who to prosecute. The goal of a polygraph is to get a confession since polygraph results are inadmissible.
A poly can just a easily be a defense lawyer’s tool if his client passes. It’s up to a judge’s discretion if it’s admissable. If it’s not, The defense attorney can also tell the jury that they offered it but that the judge refused.
Obviously, the DA isn’t going to pay for it. $10k is not that much money in a case like that, considering the stakes. I’d gladly pay and have my attorney put the polygraph tester on the stand as my witness. You think a jury is going to ignore that? Laff.