.... government documents handed over to defendant Ross Ulbricht's defense team have prompted the defense to cry foul.

Ulbricht attorney Joshua Horowitz, in a new legal filing, wrote that the "explanation of how the FBI discovered the server's IP address is implausible." [PDF]

For starters, he said, the government has maintained no record of packet logs [PDF] of the FBI actually capturing leakage from the CAPTCHA.

"Failure to preserve packet logs recorded while investigating the Silk Road servers would defy the most basic principles of forensic investigative techniques," Horowitz wrote ....