Canada officials misled the chief financial office of Huawei, Meng Wanzhou when she was detained at Vancouver airport.
Ms Wanzhou, who is at the centre of an extradition battle between Canada and China, was questioned for almost three hours and was forced to surrender her electronic devices.
Mrs Wanzhou’s lawyer Richard Peck told the court that police violated her rights under Canada’s charter, and accused the government of engaging in a convert criminal investigation under the pretext of immigration issues.
“There [was] nothing routine about this,” Mr Peck said.
Canada’s attorney general argued an arrest warrant can be executed after a person has passed through customs, and it is lawful to share information between border security agents and the FBI.