Zurich prosecutors say the man, who worked for the Rega air ambulance service, was found dead Wednesday morning in a city police jail. Initial investigations indicated that no one else was involved.
The man, whose name wasn’t released, was arrested on Tuesday.
Prosecutors opened an investigation into suspected violation of professional secrecy after Rega and Schumacher’s family filed criminal complaints.
Rega arranged the seven-time F1 champion’s transfer in June from a hospital in France to a hospital in Switzerland, to continue his recovery from his Dec 29 skiing accident.
Schumacher’s manager later said medical documents purported to be Schumacher’s were being offered for sale to some media.