GERMAN cops probing Madeleine McCann suspect Christian B vow there will be “no let up” – despite him whining he is being persecuted.
And detectives believe his prison rant is a “clear sign” he’s “cracking under the weight of suspicion”.
It emerged earlier this week that the convicted rapist and child sex offender, 44, had penned a letter slamming the investigation as a “scandal” and said they “should resign” for “persecuting an innocent person”.
But a source close to the case told Sun Online: “German officers will not be deterred by the words and actions of a criminal.
“They remain convinced he is linked to Maddie’s disappearance and there will be no let up in proving this is the case.
It comes as it was claimed Christian B’s “playboy” lifestyle covered up his crimes, with one ex-girlfriend telling the Mirror: “Chris could be very, very charming, very funny and very smooth in the way he talked.
“He always dressed nicely, held the door open, that kind of thing. He drove the nice car – the black Jaguar – was very gentlemanly and spoke properly.”
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