MISHAWAKA, Ind. -- A Mishawaka doctor and his daughter have been arrested and charged with dealing in a controlled substance, according to the St. Joseph County Prosecutor's Office. The doctor is also accused of having sex with a patient and then paying her for sex with prescription drugs, according to court documents.

According to the probable cause affidavit, between October 31, 2012 and November 18, 2013, Dr. Charles Myers delivered a controlled substance, classified as Schedule II, with no legitimate purpose.

On October 17, 2012, Dr. Myers is accused of delivering a controlled substance, classified as Schedule IV, with no legitimate purpose.

One of the investigators wrote in the affidavit, "I strongly believe Dr. Myers is prescribing controlled substances in such large quantities and dangerous combinations that his prescribing is beyond the bounds of usual and acceptable medical practice and not for legitimate medical purposes. My investigation revealed that Dr. Myers is also prescribing controlled substances to his patients as payment for sex, that many of those prescriptions being written in the names of individuals (some known drug dealers and drug abusers) who were never his patients and who were never examined by him."

Between December 14, 2012 and August 2013, Dr. Myers is accused of writing seven prescriptions in the name of a woman who was not a patient. Those prescriptions were written for oxycodone, methadone, Adderall. They were picked up by the sister of the person whose name was on the prescription.

The woman who picked up the prescription, allegedly in her sister's name, told investigators she was an addict. She also said she began a sexual relationship with Dr. Myers during a visit in 2010.

After the first sexual encounter, she asked him for $1000 and he paid her that money, according to the investigation.

She told investigators Dr. Myers paid her approximately $10,000 for sex over a two year period. Then he told her he could no longer pay for sex and offered to pay her with prescriptions, according to the investigation.

The prescriptions were written in the woman's name and the names of several other people, investigators said.

Multiple other patients told investigators they received prescriptions for controlled substances although Dr. Myers never examined them, according to court documents.

Autumn Myers is accused of selling Adderall pills to a person she communicated with through text messages. The female told investigators she purchased approximately 40 Adderall pills from Autumn at $5 per pill.

Dr. Myers has been charged with one count of dealing in a Schedule II controlled substance and one count of dealing in a Schedule IV controlled substance.

Autumn is charged with one count of dealing in a Schedule II controlled substance.

The state filed a motion to suspend practice of medicine as a condition of Dr. Myers' bond. The court granted the motion Wednesday afternoon.

Autumn Myers posted bond and has been released.