Arkham Asylum has a poor security record and high recidivism rate, at least with regard to the high-profile cases—patients, such as the Joker, are frequently shown escaping at will—and those who are considered to no longer be mentally unwell and discharged tend to re-offend. Furthermore, several staff members, including its founder, Dr. Amadeus Arkham, and his nephew, director Dr. Jeremiah Arkham, as well as staff members Dr. Harleen Quinzel, Lyle Bolton and, in some incarnations, Dr. Jonathan Crane and Professor Hugo Strange, have become mentally unwell.