I Will Walk Like a Crazy Horse (1973)

When his mother dies, the police want to talk to Aden Rey, but Aden, a guilt-ridden epileptic, has left for the desert. There he comes upon Marvel, a noble savage. Aden, Marvel, and Marvel's goat become companions through travels, a wedding, an examination of Aden's role in his mother's passing, a trial, additional deaths, and various meals. There are also flashbacks to Aden's childhood and his relationship to his mother. Meanwhile, the police step up their efforts to find Aden.