Dehon's beatification depended upon a miracle being approved. These miracles are most often healings of a miraculous nature in which medicine and science fail to explain the healing itself. The case chosen came from São João del Rei and was investigated from 1961 until some point later while another process was opened and closed in the same location in 1965. The miracle in question involved the healing of the electrician Geraldo Machado da Silva from a grave case of peritonitis on 1 June 1954. The C.C.S. validated this process on 4 October 2002 and medical experts approved the healing as a miracle on 15 May 2003. Theologians approved it also on 21 November 2003 after confirming the miracle came after Dehon's intercession was invoked while the C.C.S. confirmed the findings of the two boards later on 20 January 2004. John Paul II confirmed the healing as a miracle on 19 April 2004 and confirmed that Dehon would be beatified.