Notes about his sexual exploits were discovered on devices of Murphy (38), the Irishman convicted of murdering US nurse Mackenzie Michalski

Murphy, jailed for murder this week in Budapest, is clearly a dangerous, determined predator, but the kind of violence he used is normalised in mainstream pornography

Notes about his sexual exploits were discovered on devices of Murphy (38), the Irishman convicted of murdering US nurse Mackenzie Michalski

Describing what they believe to be part of normal sex, boys name slapping, whipping, strangulation and gagging - all acts they report seeing in pornography