The suspect in the disappearance of little Madeleine McCann kept a stash of child pornography and girl’s swimsuits and other clothes inside his mobile home, according to a new documentary.

Police allegedly discovered the sickening cache — including 8,000 images of children being abused — inside Christian Brueckner’s RV in 2016, amid a probe into several kids’ disappearances.

A documentary that aired on German TV on Monday night revealed some of the contents of the mobile home, the UK’s the Sun said.

Brueckner, 43, reportedly bought the red and white Allegro Bay RV in early 2010 — three years after moving back to his native Germany from Portugal.

Friends told the Spiegel TV show he used it to drive regularly back and forth between Germany, Spain and Portugal.

A former pal of Brueckner’s said the suspect “told me, ‘I can transport children, kids, in this space. Drugs and children, you can transport them in this van, it’s a safe space in the van, nobody can find them. Nobody can catch you.’”

Brueckner, a convicted rapist and pedophile who is currently behind bars in Germany on drug raps, claims he had nothing to do with Madeleine’s disappearance in Portugal in 2007.

Police first questioned him about the missing British child in 2013, according to the documentary.

His claims of innocence came a day after German authorities said they have “concrete evidence” that Madeleine is dead and Brueckner killed her, although they won’t reveal details yet because they don’t want to blow the case.

Madeleine was 3 when she vanished from the resort villa rented by her parents for a family vacation in Portugal 13 years ago.