DeMathew was pronounced dead on arrival at Thika Nursing Home.
Benga musician John Ng'ang'a, alias John DeMathew, has perished in a road crash at Blue Post Sunday evening.
Thika Base Commander Elenah Wamuyu said Demathew's car rammed into a lorry near Blue Post Hotel. He was alone in the car.
Gatanga MP Ngugi Nduati said DeMathew was coming from a harambee that was held at Metro Bar in Thika in support of fellow musician Peter Kigia.
He was pronounced dead on arrival at Thika Nursing Home.
Until his demise, he was the chairperson of the newly-launched Tamco Sacco that aims to uplift the welfare of musicians.
"We want to come together and join a Sacco to pool resources together so that when we die, our families do not resort to harambees to give us a decent send-off," he said early this year at Thika Greens during the launch.