The lawyer for former Guantanamo Bay detainee Omar Khadr says his client will seek bail while a judge decides his appeal in the United States over his disputed conviction for war crimes.

Nate Whitling said Friday that the March 24 bail hearing would be Khadr's first attempt at freedom since his return to Canada in 2012 after spending a decade at Guanatamo.

Khadr pleaded guilty in 2010 to five war crime charges, including killing a U.S. soldier in Afghanistan when he was 15. He's now 28.

He was sentenced to eight years, but the military commission did not specify if it was a youth or adult sentence. He later said his guilty plea was his only way out of Guantanamo.