Human Rights Watch (HRW) has said the arrest on Monday of Rwandan rebel leader Callixte Mbarushimana in France for serious crimes in the Kivu region of the Democratic Republic of Congo in 2009 sends a strong signal to other abusive commanders that the International Criminal Court (ICC) will be persistent in its apprehensi on of suspects. French police arrested Mbarushimana Monday morning in Paris, where he has resided since 2003.