Stefano Brizzi met Gordon Semple online and, after arranging to meet, strangled him before trying to dissolve Semple's body in a bathtub of acid.

Claire Wood met George Appleton on a dating site. When she ended the relationship, he harassed her, eventually strangled her, and set her body on fire.

Luke Harlow lures Kayleigh Haywood to his home via Facebook. He and his neighbour, Stephen Beadman, hold her hostage there, before Beadman rapes and murders her.