Murder of a deposed Sheikulislam in 1821/ was this Haci Halil Efendi? 

There is information in some sources about a deposed Sheikhulislam who was travelling in 1821 to Mecca with his family for pilgrimage, it was the time of the Greek war of Independence and their ship was captured by Orthodox Christians of Hydra and everyone on board was killed. The source state that this Sheikhulislam was actually pro-Greek but still got murdered. Unfortunately the name of the Sheikhulislam is not mentioned, is it possible that this person would be Haci Halil?

Has anybody more information about Haci Halil Efendi? The source claims without sources that he was murdered in Constantinople by torture. It states that he was deposed because he tried to prevent a massacre of Greeks, but we also need Turkish/Ottoman sources.
The article needs more sources and investigation.  

The following is written in Massacres during the Greek Revolution.

"Another similar massacre took place in the island Hydra, one of the most important Aegean islands. Besides the atrocities committed against the local Muslims in the island, two hybrid brigs captured a Turkish ship laden with a valuable cargo, and carrying a number of passengers. Among these was a recently deposed Sheik-ul-Islam, or patriarch of the Orthodox Muslims, who was said to be going to Mecca for pilgrimage. It was his efforts to prevent the cruel reprisals which, at Constantinople, followed the news of the massacres in Peloponnese, which brought him into disfavor, and caused his exile.W. Alison Phillips, The War of Greek Independence, p.66 There were also several other Turkish families on board. British historian of the Greek revolt, W. Alison Phillips noted: The Hydriots murdered them all in cold blood, helpless old men, ladies of rank, beautiful slaves, and little children were butchered like cattle. The venerable old man, whose crime had been an excess of zeal on behalf of the Greeks, was forced to see his family outraged and murdered before his eyes..."W. Alison Phillips, p. 67