need help with an episode

In short, my story is: Dalziel and Pascoe are shown really late here, somewhere around midnight, so my dad tapes it and we watch it the next day.
But last night the schedule got shifted a bit without my dad knowing and before we could see the end, the tape run out.
I am dying of curiosity to know who the killer is, so can anyone help me?
The name of the episode is "Death in the family" and I've seen it to the part where Khan talks to Imad about the money.