Stated differently, the exhibit was not used as extrinsic evidence to prove that Clark hacked a company's website, but as an "incriminating admission" relevant to Clark's advanced computer skills. United States v. Bradshaw , 280 F. App'x 477, 480 (6th Cir. 2008). In the same way, Thierauf's testimony was used for the relevant purpose of establishing Clark's level of computer expertise, not as Rule 404(b) evidence.