Complex sentence: Kemper endeared himself to his psychiatrists by being a model prisoner and was even trained by the staff to administer psychiatric tests to other prisoners, with one of his psychiatrists later commenting: He was a very good worker and this is not typical of a sociopath.
Split into simpler sentences: Kemper endeared himself to his psychiatrists by being a model prisoner and was trained to administer psychiatric tests to other prisoners. One of his psychiatrists later commented: He was a very good worker and this is not typical of a sociopath.