Perugia, January 13 - Italian authorities have issued a new custody order for Federico Bigotti, whose mother was recently found stabbed to death in her new home, sources close to the case told ANSA. Earlier on Wednesday a court had annulled his pre-trial custody order due to procedural issues, but he will now remain in prison. Prosecutors in Perugia say Bigotti's release would pose too much of a danger, based on accounts from his relatives, ANSA sources said. So far, Bigotti, 21, has maintained that he saw his mother Annamaria Cenciarini stab herself with a kitchen knife in their family home in Città di Castello, a story which investigators have said is not credible.