In United States v. Stephen Buyer, No. 23-7202 (2d Cir. Mar. 19, 2025), the Second Circuit upholds the defendant’s trial convictions for securities fraud. This is a dense summary order, but let’s start with the ruling that jumps out.
At trial, defendant objected to admission of a Cellebrite forensic cellphone report. The analyst who actually prepared this forensic report had left the FBI, so the government sought to offer the report through a surrogate witness—per the defendant’s brief, “a last-minute substitute for a previous witness that the government was going to call.” Before this surrogate witness took the stand, the defendant objected to the testimony. The district court limited argument on the issue during trial and allowed the witness to testify, but invited the defendant to submit a supplemental written objection later that day.
So later that day the defense filed a written motion to strike the testimony. The …