Since the age of 19, most of Hammer's time in prison was spent in special housing or solitary confinement, for a multitude of offenses: larceny, escape, the hostage takings, and telephoning in a bomb threat. After two escapes, Oklahoma County prosecutors charged him with kidnapping, robbery using a firearm, and shooting with intent to kill. Convicted, the judge sentenced Hammer to 400 consecutive years on each count. In all, Hammer was serving 1232 years for multiple Oklahoma convictions. An Oklahoma post-conviction application challenging the truth of the shooting/kidnap victim's testimony identifying Hammer was granted in part after the judge found the victim's trial testimony was false and not credible. The Oklahoma judge ordered a sentence modification hearing for Hammer.