After the coup of July 29, 1975 by Brigadier Murtala Mohammed, he was made Military Governor of Bendel State, since split into Edo State and Delta State. Soon after taking control, he dissolved the executive council and the boards of statutory corporations, suspended all contract awards, and set up committees to review finances and projects undertaken by his predecessor Samuel Ogbemudia. Several serving officers were retired from service.
On February 13, 1976, General Murtala Mohammed was killed in a failed coup and his second-in-command, his Chief of Staff Lt-Gen. Olusegun Obasanjo, was appointed as Head of State. In March, Obasanjo reassigned Colonel Innih to Kwara state, replacing him with Navy captain Hussaini Abdullahi. Innih served in Kwara State as Military Governor until 1978.
He was Quarter Master General of the Nigerian Army (1978–79) and General Officer Commanding, I Infantry Division, Nigerian Army (1979–80), when he retired.
Innih became the President of Retired Officers of Nigerian Armed Forces Organization (RANAO). He was Chairman/Managing Director Niger Valley Agro Industries Limited, Chairman / Managing Director Tamsaks Nigeria Limited and Chairman Bridgestone Finance Limited. He was honored with the Order of the Federal Republic (OFR). The University of Ilorin awarded him an Honorary Doctor of Law in 1998. He died in 2002.