Well, he's found his rear end in jail. Something he's done or witnessed is relevant to the case.
And a lot of people were convinced that the two security guards who were the first arrested in this case had something to do w/ Natalee's disappearance.
...Police Commissioner Jan Van Der Straten said the arrest [Croes] came after one of the three jailed youths named a fourth person in the case....
Not me.
Though PvdS may have something on them.