Bali Nine lawyer calls for Australia to oppose Boston bomber's death sentence

The lawyer of executed Bali Nine pair Andrew Chan and Myuran Sukumaran has called on the Australian government to oppose Boston marathon bomber Dzhokhar Tsarnaev's death penalty.

In this courtroom sketch, convicted Boston Marathon bomber Dzokhar Tsarnaev stands as he is sentenced to death at the United States courthouse in Boston, Massachusetts, USA, 15 May 2015. Source: EPA

The lawyer who represented Andrew Chan and Myuran Sukumaran has called on the Australian government to speak out against the death penalty handed to Boston marathon bomber Dzhokhar Tsarnaev in the US.

Veronica Haccou says she promised the executed Bali Nine drug smugglers she would fight the death penalty, no matter the crime.

A US jury sentenced 21-year-old Tsarnaev to death on Friday for his role in the 2013 Boston Marathon bombings, which he carried out with his brother.

Three people died and 264 others were wounded in the blasts, including 17 who lost limbs.

Ms Haccou says the Australian government must remain consistent in its opposition to the penalty.

"It is nothing but premeditated, state-sanctioned murder," the lawyer said in a statement on Saturday.

Ms Haccou said reform was always possible, even in the case of the Boston bomber.