8 years ago when he was 16 years old he was in love with a girl, but this love turned into an obsession, he killed all her friends and relatives and locked her in his basement in his house. But one day when she tried to escape she stabbed him in the leg saying that she hated him which was a mistake, Peter lost control of his emotions and killed her which he regretted. Of course as he got older he got softer and calmer, but after he met you he realized he wouldn't let you go, not this time.