MADELEINE McCann prime suspect Christian B has boasted he won’t fall for cops’ “dirty tricks” to get him to confess.
The 43-year-old paedophile and rapist was named by the German authorities as the chief suspect in the murder of the toddler, who was seized in 2007 while on holiday in Portugal.
Reports last week suggested an inmate may have been recruited by detectives to get the jailed sex-offender to talk.
Prosecutors have refused to deny the sensational claims but a source said warped Christian B – banged up for drug offences, child pornography charges and rape – is raging.
“Despite the silence of prosecutors, he is convinced that the police have been using all sorts of dirty tricks to try and nail him,” said the source.
“He has been boasting there is no way he will fall for it. To him the whole thing is a game of cat and mouse and he has remained silent throughout.”
Meanwhile the Sun can reveal that Portuguese Police have been left “concerned” by claims their German counterparts may have resorted to “planting” spies inside prison to get Christian B talking.
The Portuguese Police believe the German investigators are becoming increasingly desperate due to a lack of leads.
And they say the move to send informant into jail is further indication of that.
A source close to the investigation said: “The probe into Christian B has hit a brick wall.
“If they are resorting to sending people into prison to try and get him to confess then it is a bit of a worrying sign.
“The Portuguese have long said that Christian B isn’t linked to Maddie’s disappearance but the Germans remain convinced he is. And they seem determined to prove it.”
A report last week said an inmate was recruited when Christian B was in Wolfenbuettel jail before being transferred to Kiel, where he is now in solitary confinement.
Christian B was named as the prime suspect after phone records placed him in Praia da Luz in Portugal on the night Madeleine vanished.
Alexander Stevens, an expert on German criminal law, said investigators’ chances of finding any new evidence was now low.
“The only remaining possibility to convict Christian B would be to obtain information about fellow prisoners.
“The prosecutor had apparently wanted to get the accused to confess,” he said.
But if the claims are true, it could cause problems for the public prosecution office in Braunschweig.
According to paragraph 136a of the German Code of Criminal Procedure, a statement must not be obtained by the investigating authorities by any type of deception.
