Chiba police have turned over to prosecutors their case against 10 immigration officers suspected of being involved in the death of a Ghanaian deportee they had restrained and physically placed aboard a jetliner last March at Narita International Airport.

The action Monday came six months after the man's Japanese widow and her lawyers filed a criminal complaint demanding that prosecutors take action against the airport immigration officers who overpowered Abubakar Awudu Suraj to get him on the jet, where he subsequently died of unknown causes while handcuffed in his seat.

The police turned their case against the 10 men, aged 24 to 48, who are still working, over to the Chiba District Public Prosecutor's Office. They could face charges of violence and cruelty by special public officers resulting in death, a Chiba police officer said.