Inés del Río Prada, of the Basque separatist group Eta, was a member of a unit that killed 24 people, including 12 in a car bombing in the centre of Madrid. Her release earlier this week at the command of the European court of human rights (ECHR), prompted a wave of outrage. The Spanish courts had little choice but to let Del Río go free. She had been sentenced in 1989 to 3,828 years in total, but because of a peculiarity of Spanish law dating back to 1973, she could serve a maximum of only 30. Given time off for...