Grasso was found dead after a December 4 arson at the drug rehabilitation community 'Tenda di San Camillo' in Riposto, Sicily, where he was the director.
The suspect is a former drug addict and guest of the community. He first attacked and possibly killed Grasso with a wooden stick, and then around 5 a.m. set a fire which spread through the building.
Grasso was a estate agent and womaniser until the age of 50. After the sudden death of his parents he changed his life, entered the Camillians and became a priest.
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