Japanese authorities will not be held responsible for the death of a Sri Lankan woman who died while in custody at an immigration center in Nagoya last March, after prosecutors decided to drop the case against the then-senior officials on Friday.

Ratnayake Liyanage Wishma Sandamali's relatives filed a criminal complaint with the Nagoya District Public Prosecutors Office last November against the immigration center's senior officials, accusing them of causing her death by failing to provide appropriate medical care.

The prosecutors office had been investigating the case as suspected murder and abandonment by a person responsible for protection, based on Wishma’s medical report, testimonies of the parties involved and insights from medical experts. But they have decided to drop all criminal charges against the then-senior officials on the grounds that they could not be proven.