'Manipulative' paedophile blackmailed victims to eat dog food and lick toilet seats

A paedophile blackmailed young internet victims into extreme and degrading sexual and physical acts, forcing one to lick toilet seats and eat dog food.

Cambridge graduate "highly manipulative" Matthew Falder made children, young men and women photograph themselves in compromising positions, sharing the material online with other paedophiles on the so-called dark web.