What Proves that "the expert and his methods couldn’t possibly be reliable"?

I am developing an allergic reaction to the following kind of argument: "A forensic-science expert testified that a trace at the crime ...

What the FBI Hair Examiner Said About Race in State v. Manning

Two previous postings discussed the meaning and import of FBI testimony about hair in a trial of Willie Manning. I questioned Justice Breyer...

Validity, Overclaiming, and Error: More on Willie Manning's Exoneration

Yesterday I questioned reliance on the exoneration of Willie Manning as a case in which hair evidence was severely undermined, prompting hi...

Justice Breyer in Glossip v. Gross on "flawed testimony from an FBI hair examiner"

Justice Stephen Breyer recently proposed that the Supreme Court reconsider the constitutionality of the death penalty. One of his concerns i...

In His Own Words: Justice Scalia's Poetry Slam

In discussing the exchange in Glossip v. Gross between Justices Breyer and Scalia on the deterrent effect of capital punishment, I alluded ...

Two Scientific Issues in Glossip v. Gross

In Glossip v. Gross , the Supreme Court narrowly upheld a district court's refusal to issue a preliminary injunction against a three-dru...

DNA Evidence Causes Wrongful Convictions 15% of the Time!?

Today's Forensic Magazine reports that Recent estimates indicate that as many as 15 of every 100 incarcerated offenders where DNA was ...