Has an adopted son, Jefferson, with his ex-wife, Ellen Burstyn.
Suffering from mental illness, he stalked his ex-wife, actress Ellen Burstyn for a number of years. Committed suicide in 1978 by opening the window of his ninth-floor Manhattan apartment and jumping.
Talented writer and story editor (on TV's "The Monkees" (1966), whose '60s career began to slide while wife Ellen Burstyn's career began to rise.