page 117....

.....inspector sultan  showed sympathy  to them,   the door remained open all night of the seth,  he lighted his cigarette  before   continuing  that  it was easy for the killer  to get in, both agreed  in one voice and asked  who could that killer be  because  it was impossible for any outsider  to enter  the premises,  the inspector asked them  cleverly 

The son explained  he was not certain but it was a possibility that he could  suspect  the driver mazhar  because  father had beaten him up with a stick 

  But why did the seth beat Mazar up

   That fool almost crushed father's  brother under the car,  uncle was crossing the road  , the driver hit him, by the time father got out to reach him uncle's  temper gad skyrocketed