 O'Collun, with his accomplices John Annias and William Polwhele (who were both soldiers in Stanley's regiment), returned to England in November 1593, where his behaviour soon attracted suspicion- in particular he was found to possess a copy of the Jesuit pamphlet "Philopater", which justified tyrannicide.He, Annias, and Polwhele were arrested and interrogated.O'Collun and Annias confessed "after a fashion", which presumably meant under torture