"Everybody has to cross the river"

http://www.robmathiowetz.com/

The following rules apply:

* Only 2 people on the raft at a time.

* The Father cannot stay with any of the daughters, without their Mother's presence.

* The Mother cannot stay with any of the sons, without their Father's presence.

* The thief (striped shirt) cannot stay with any family member, if the Policeman is not there.

* Only the Father, the Mother and the Policeman know how to operate the raft.

The solution is both logical and complex. Deductive reasoning required. If you need a hint I'll post one.

(Beware of Pirates.)