As used in this chapter:
(a) "Dangerous offender" means a person who has committed an offense, whose history, character and condition reveal a substantial risk that the person will be a danger to others, and whose conduct has been characterized by a pattern of repetitive, compulsive or aggressive behavior with heedless indifference to the consequences.
(b) "Repeat offender" means a person who has a history of persistent criminal activity and whose character and condition reveal a substantial risk that the person will commit another offense. It is prima-facie evidence that a person is a repeat offender if any of the following applies:
(1) Having been convicted of one or more offenses of violence, as defined in Section 606.01, and having been imprisoned pursuant to sentence for any such offense, the person commits a subsequent offense of violence;
(2) Having been convicted of one or more sexually oriented offenses, as defined in Ohio R.C. 2950.01, and having been imprisoned pursuant to sentence for one or more of those offenses, the person commits a subsequent sexually oriented offense;
(3) Having been convicted of one or more theft offenses, as defined in Section 642.01, and having been imprisoned pursuant to sentence for one or more of those theft offenses, the person commits a subsequent theft offense;
(4) Having been convicted of one or more felony drug abuse offenses, as defined in Section 624.01, and having been imprisoned pursuant to sentence for one or more of those felony drug abuse offenses, the person commits a subsequent felony drug abuse offense;
(5) Having been convicted of two or more felonies, and having been imprisoned pursuant to sentence for one or more felonies, the person commits a subsequent offense;
(6) Having been convicted of three or more offenses of any type or degree other than traffic offenses, alcoholic intoxication offenses, or minor misdemeanors, and having been imprisoned pursuant to sentence for any such offense, the person commits a subsequent offense.
(ORC 2935.36)