Complex sentence: Andorfer's deputy, Enge, was apprehended in the 1960s, and sentenced to one-and-a-half years imprisonment--his sentence was never carried out due to his old age and poor health.
Split into simpler sentences: Andorfer's deputy, Enge, was apprehended in the 1960s, and sentenced to one-and-a-half years imprisonment. His sentence was never carried out due to his old age and poor health.