Serrin A. Turner

Serrin A. Turner developed the prosecution's account of Silk Road's operations and its identification of Ulbricht as the continuing operator. Through Jared Der-Yeghiayan, he explained purchases, bitcoin payments, escrow, commissions, and DPR's authority over staff and site rules. He used comparisons among undercover chats, laptop photographs, and discarded rating notes to develop attribution evidence, then returned on redirect to the arrest-day chat and website-registration details. Those connections had limits: the court barred an inference that use of the same PGP private key established a single user, and Turner narrowed his questioning accordingly.

Turner also argued over how jurors could hear and use online communications. He supported two-person readings; the court permitted readings involving prosecutors or witnesses but barred paralegal readings. He argued that DPR commands could demonstrate authority without being offered for their truth, other statements could be admissions, and drug listings could be offers. The court required clear questioning about nontruth uses and maintained its coconspirator rationale. In disputes over alternative operators, Turner sought exclusion of selected Karpeles-related testimony and challenged authentication of writing comparisons involving Anand Athavale. The court struck selected agent testimony while retaining other Karpeles evidence, and allowed factual writing comparisons but excluded the agent's conclusions.

Turner's forensic examinations addressed both evidence handling and challenges to collection. Gregory Fine described the seizure and transport of USB drives from Ulbricht's bedroom. Christopher Jon Beeson explained live imaging, copying, hash records, and photograph timestamps that were about 40 minutes slow. On redirect, Turner distinguished changes inherent in live collection from fabrication of historical records. Beeson acknowledged collection changes but denied that the errors prevented a complete copy or generated the logs Turner described; further redirect established that RAM capture had not prevented viewing historical content.

Turner used independent account records to develop additional connections to the laptop material. Gary Luis Alford compared Altoid posts, emails, Facebook records, personal information, and a matching Gmail login IP address. Through Alex Miller, Turner traced a Stack Overflow account's change from Ross Ulbricht to Frosty. After cross-examination raised limits on identifying the actual user, his redirect established the Facebook login requirement and registration timeline, adding account-access evidence rather than a direct identification of who typed each post.

Turner's examination of cooperating vendor Michael Duch addressed heroin sales, vendor systems, and transaction records, alongside cooperation incentives and Duch's lack of knowledge of DPR's identity. Redirect distinguished Duch's personal encryption rule from Silk Road's requirements and clarified his account of possessing individual heroin glassines in relation to daily use. During the defense case, Turner tested character witness Daniel Jefferson Davis's knowledge by asking about nine fake IDs. Davis denied being told about that conduct, and the court overruled objections to those questions.

Turner sought instructions supporting a distribution theory that included brokering-related activity; the court deferred disputed instruction issues. He later corrected his description of authorities concerning organizer language, without an instruction ruling in that exchange. Opposing acquittal, he cited vendor agreements, staff chats, transaction data, and other evidence; the court denied the motion. In his Day 11 closing, Turner argued that records distributed across the laptop, residence, server, and outside accounts defeated the defense's handoff and planted-evidence explanations. He sought conviction on all seven counts, while acknowledging that the judge's instructions would control.