One simple way to get Sanwo-Olu to answer to his role in the #LekkiMassacre is for survivors to file petitions to the Lagos Judicial Panel of Inquiry. A simple petition will do: state the facts and name Sanwo-Olu as one of the violators of your right.
Though, Sanwo-Olu enjoys constitutional immunity against arrest and prosecution but not investigation. The Panel can question and investigate him. Case of the unintended effect of setting up a Panel!