Professor John Carr (died 2020) was a respected numerical analyst at Gotham University.
John Carr worked as a numerical analyst at Gotham University. He briefly taught courses in cryptography at GU. At one point, Carr underwent a heart operation, causing him to receive a pacemaker.
Being widely known for his work, Carr was one day kidnapped by Hush at gunpoint from the GU library as he was working. Carr brought to Arkham since Hush and Mouse believed that a linguist like him would be able to translate Lucius Fox's journal. Spitefully, Alice only gave the professor 90 minutes to do the work, all the while electrocuting Carr to get "inspiration". Eventually, the strain of the electrocution caused Carr's heart to give out, killing him.