Sowmith Katragadda told an evidence-gathering hearing in Meng's B.C. Supreme Court extradition case he couldn't recall where the idea came from.

Meng's defence is trying to build a case for abuse of process, claiming Canadian officials gathered evidence to support an American case against her under the guise of a routine immigration exam.

Brandon Teixeira was arrested in Oroville, Calif., in December and is facing first-degree murder and attempted murder charges in B.C.

At issue at this week's hearing is the legal test of double criminality, meaning if the allegations are also a crime in Canada then Meng should be extradited to the United States.

A two-day extradition hearing is underway in Edmonton to determine whether a man who allegedly helped pay for his relatives to travel to Syria will be sent to the United States to face terrorism charges.

In his first U.S. court appearance on Wednesday, Canadian Karim Baratov pleaded not guilty to charges that he helped Russian agents in a high-profile cyber attack on Yahoo email accounts, his lawyer said.

Karim Baratov signed documents agreeing to waive the hearing before a Hamilton judge on Friday.

Lawyers for a Canadian accused in an international hack of Yahoo email accountssay a judge who denied their client bail overstated his alleged role in the scheme.

Karim Baratov was arrested under the Extradition Act last month after U.S. authorities indicted him - and three others - for computer hacking, economic espionage and other crimes.