Maybe the museum hired the thieves to steal them? I'm sure they were both insured for many millions....that way they keep the paintings and get the insurance $$$

The mentioned prints were stolen from the Fasanengalerie, a private gallery near western Berlin's central shopping district. The prints are not the only art pieces that are missing in all they are 30 works that have been taken. The owner of said gallery and the police have said the following: "The theft took place over the New Year's holiday, police said Friday, the works are worth an estimated €180,000 ($250,000) — apparently stolen between Wednesday afternoon and lunchtime Thursday, police spokeswoman Claudia Schweiger said. The sketchings, prints and sculptures included "Profil au fond noir," a 1947 work by Picasso; "Nude in a rocking chair," a Matisse print from 1913; and "Le Boupeut," a 1962 color print by Georges Braque. The gallery's owner discovered the loss on New Year's Day, having found signs the door had been pried open, police said. Given the number of works stolen and the weight of the sculptures, two or more people probably were involved, police said in a statement". This is not a very credible situation it is sort of careless, I also believe that it was an inside job to collect the insurance and keep the art pieces this is what happens when there is a financial crisis.