A thief-turned-serial killer nicknamed Lucifer has been blamed for murdering 48 other inmates from behind bars.
Brazilian prisoner of 25 years, Marcos Paulo da Silva makes Britain’s most dangerous lag Charles Bronson look almost harmless by comparison.
Da Silva's reported signature mark on his victims is to cut their heads off and disembowel them after killing them.
The 42-year-old was first jailed for petty theft in 1995, aged just 18 and is believed to have clocked up a death toll of 48 since.
Most notoriously it is said he murdered five inmates in one go in 2011 at Serra Azul Jail, Sao Paulo.
In comparison, armed robber Charles Bronson, 67, has spent the last 45 years in prison after repeatedly having his sentence increased for attacking prison staff and taking them hostage.
He was first sentenced to seven years in jail. He was given life for kidnapping a prison teacher in 1999 after several sentence extensions.
Serial killer Marcos is now set to die behind bars himself thanks to his multiple convictions resulting in jail sentences totalling 217 years.
According to local reports, the lag has not even been tried for all of his bloody crimes.
Da Silva is said to have told a judge recently: “I have no regrets about killing all these people.
“They were rapists and thieves who took advantage of other inmates and robbed them.”
His astonishing prison history was laid bare in a recent report by Brazilian online firm UOL which has been picked up by newspapers in South America as well as Portugal.
'Lucifer' has been described as the leader of a gang of assassins created with the mission of murdering members of the PCC, one of Brazil’s leading gangs understood to have been formed by inmates for their own protection.
Prison guards told UOL it was only a “question of time” before da Silva, covered in tattoos which include skulls, devils and a Swastika, kills again once he is transferred to a new prison.
It is said he switched allegiances and turned against PCC after joining the gang as a 19-year-old following his first teenage conviction.
He reportedly used a fire extinguisher to knock his Serra Azul Prison victims unconscious before beheading them with a home-made knife in his most infamous jail massacre to date.
He is said to have yelled: “I love this, there’s so few, I want to kill more prisoners” as he snubbed out their lives.
The number of prisons willing to take him is now drying up. Psychologists say he is not mentally ill but does suffer from a personality disorder that needs to be urgently treated.