In March 1981, serving as an ad hoc Judge of the Supreme Court of Pakistan, he refused to take a fresh oath, under the Provisional Constitutional Order (PCO) promulgated by GeneralZia-ul-Haq along with Justice Dorab Patel and Chief Justice Sheikh Anwarul Haq. The PCO not only negated the independence of the judiciary but also prolonged martial law by nullifying the effect of a judgement giving General Zia's regime limited recognition.
Ebrahim established the Citizen Police Liaison Committee (CPLC) in 1989. The CPLC works in the mega city of Karachi and has immensely helped the common man in getting the First Information Report (FIR) registered if it is refused by police for some any reason.