The number of improper DNA analysis cases conducted by a former Saga Prefectural Police forensic employee rose to 239 from 130 identified in an internal probe, the National Police Agency said Thursday.
The NPA released a report on a special inspection that reviewed 643 DNA tests linked to the former employee of Saga police.
The report said the agency cannot rule out the possibility that investigations were negatively affected in 37 cases, including those in which retesting was impossible.
