A month later, Wilbur Fisher was back in the hospital. During that stay, Todd Fisher charged $10,000 to his father's credit card without permission, charges state. The Adult Protective Services worker told investigators that Wilbur Fisher said he didn't want his son to get in trouble for it.

Another witness told investigators that Wilbur Fisher often called his son names, saying he was "stupid," "dumb," and "good for nothing," charges say. Other witnesses said that the father-son relationship was strained.

Wilbur Fisher had a $60,000 life insurance policy in effect and a will that directed his property and bank accounts to his son, Todd Fisher, court documents say.

Some of those documents were found in the safe. Despite Todd Fisher's claim that someone broke into it, Dawson County Sheriff's deputies didn't see any sign of forced entry, court documents state.

After Todd Fisher reported his father's death on Oct. 16, law enforcement visited the Fisher home west of Glendive. Deputy Coroner Tyler Sihla estimated that Wilbur Fisher, who was found on a bed, had been dead for at least a day.