The Court of Justice of the European Union (CJEU) reaffirmed the prohibition of the general and undifferentiated retention of data generated by electronic communications for the purpose of combating serious criminal offences, in a judgment handed down on Tuesday 5 April (Case C-140/20).
Graham Dwyer, who was sentenced to life imprisonment for murder in 2015, is challenging the use of phone call data as evidence in Irish courts.
In a case brought by the Irish Supreme Court, the CJEU...