Defendant was jury-convicted of first degree murder ( § 565.003) 1 in connection with the September 10, 1981, killing of John W. Kemm (hereinafter Kemm) and was sentenced to life imprisonment. Defendant appealed when his post-trial motions were denied. Three days before the charged homicide occurred, defendant became 19 years of age. He was employed as an orderly in a Joplin nursing home from 2:45 to 11 p.m. Kemm, who was 53 years old at the time of his death, had been widely traveled concert organist for some 12 or 15 years. He was also organist at a Webb City church where his wife sang in the choir. On the night of September 9, 1981, the Kemms returned to their Joplin residence following choir practice when Kemm left his wife with the avowed intent of going to a Joplin night club to listen to music.