The former army chief and president was sentenced to death Monday in absentia by a 2-1 special court decision.
"He has to be careful. They may think: 'Here's this rich guy who got caught and the president can't get him out so why is he more special than us?'"
Respicius Mtazangira, 51, was found guilty of killing pupil Sperius Eradius, 14, by a high court this week.
Australian man Luke Cook and his wife Kanyarat Wechapitak were allegedly involved in a criminal network.
The attack in Tokyo's subway killed 13 people and injured 6,000 others.
2016 is likely to see a record-low number of new death sentences nationwide.
Social media defies the Saudi government, repeating claims likening the Kingdom's methods it ISIS's
Since the ruling on November 17, artists across the world have denounced the sentence handed to the Palestinian poet and artist.
The Connecticut Supreme Court barred the state from executing 11 prisoners currently on death row.
Other infamous convicts, including the "Shoe Bomber," also are housed at the Colorado prison.
The move was expected from his legal team following his conviction and sentencing earlier this year.
Assistant U.S. Attorney said the ethnic Chechen had turned against his adopted country.
Jakarta resists international pressure and orders executions of drug traffickers, including two Australians, to proceed.
The U.S. carried out the fifth most executions in 2014, a new report shows.
Capital punishment was repealed in the state nearly two years ago
Mariam Yahya Ibrahim's sentence and detention for converting from Islam to Christianity triggered international outrage