The family of David “Mac” Johnston are sad to announce his sudden death on Sunday February 11, 2018 after a brief illness at Bluewater Health in Sarnia. Mac had resided in Sarnia and Port Huron, Michigan and was retired from DOW Chemical. He was predeceased by his wife Doris (1995). In keeping with his wishes there will be no public visitation or funeral service. A private family service will be held at a later date. In lieu of flowers sympathy may be expressed through memorial donations to the Sarnia and District Humane Society or to the charity of one’s choice. Arrangements entrusted to Knight Funeral Home, 588 St. Clair Parkway, Corunna. Messages and condolences may be left online @ www.knightfuneralhome.ca Knight 519-862-2845.