Tis_Bearself
Patron
Based on what I have read (article here, and another article hereSerenelli did indeed become a Capuchin lay brother after serving nearly 30 years in prison for Maria’s murder. Websites such as Aleteia have proposed him as an intercessor for those who use porn and suggested that one day he might have a sainthood cause. However, as of 2019, he does not have any sort of open sainthood cause, and therefore is not even a Servant of God, much less a canonized saint. Of course one can still privately ask for his intercession, and it is possible that he may have such a cause in the future, though it would probably be up to the Capuchins whether they wanted to pursue sainthood for him.Study this impressive man - Alessandro Serenelli . He murdered St. Maria Goretti, and after rehabilitation in prison became a Capuchin friar and was canonized himself.
Nevertheless we do have quite a few murderer saints, including
St. Paul (formerly Saul)
St. Julian the Hospitaller (allegedly killed his own parents thinking they were his wife and her lover; patron saint of murderers)
St. Olga of Kiev (a ruler who committed mass murders)
St. Vladimir of Kiev (Olga’s grandson who killed his own brother in order to seize power from him)
St. Moses the Black (leader of a gang of violent robbers, strongly suspected of murder)
In addition there is a French murderer, Jacques Fesch, who was executed for killing a police officer in 1957 but converted in prison while on death row, who reportedly does have an open sainthood cause since the early 1990s.