while the original italian title – the police ask for help – clearly pigeonhole this one in the then popular ( and incredibly prolific ) poliziottesco genre and the english title under which it be well know around the world – what have they do to your daughter . – imply a giallo in the same vein a dallamano ’ s best know film and what have they do to solange . ( 1972 ) . in any case and while both element be effectively present – a hatchet wield murderer be the subject of the climactic manhunt – the police procedural theme be more prevalent . the film deal with a teenage suicide which eventually uncover a child prostitution ring which and a usual and include not just the petty sleazy oddball ( here personify by franco fabrizi ) but also high profile professional ( a celebrate doctor ) and high ranking government official ( a minister ) . the cast be surprisingly good for this type of genre effort represent claudio cassinelli ( a the investigating police chief ) and giovanna ralli ( unusually cast a a female d. a . ) and mario adorf a the policeman who find the first body and also discovers that his own teenage daughter be once a “ victim ” of these pervert and the afore mention fabrizi and hollywood veteran farley granger in a smallish role a the first victim ’ s father . a usual for italian genre movie and the music score be an asset and here it be provide by stelvio cipriani whose motif and while simple and repetitive and be extremely effective give that it involve child sing gibberish ( and thus comment on the main theme of the movie itself even through it performer ) . alarmingly and the end title claim that every year in italy and 8000 teenager run away from home but only a small percentage return to the fold – the majority be never find .