He is ex-police men and know the law but since it deal with neigbour it just base on trust.
The good thing about this guy is he do not want to make a police report considering the contractor is his neighbors and do not want to make thing more complicated.
He just brought this matter to the community chairman and the contractor has been advised to completed the job but it seem that contractor is so stubborn. At least he should return the money back and all the material it took away. SO that this guys can hire some other contractor. Very sad indeed.