Bob Crane Murder

Bob crane case (suspect already dead)
Time and date of death: around 3 am June 29, 1978
cause of death: two forceful blows to his left temple with a blunt instrument.
Murder suspect/s: John Henry Carpenters a close friend  of the  victim
Place of death: still to confirm


police suggests that the murder weapon was John's  specifically a camera tripod.
victim is known to have a perverted lifestyle mid and late age.
both are suggested to have this lifestyle proved by a recorded conversation approved by the personel involved.
suspect is a photographer.
meeting point of both person is unknown.
but similarities in lifestyle is evident
what bothers me is why murder occurred.
theories;

1.theft (unlikely)
2.job related argument (the job was porn shooting) 
3.girls (proof    http://www.trutv.com/library/crime/notorious_murders/classics/bob_crane/3.html)
4.girls related to thier lifestyle or job (fusion of  2 and 3)

now I will focus on my second theory because I see it the most possible.
but that will send me to another impossible question.
what job related problem did they have argued about?
indeed...... very challenging.

but to whomever this notepad will get and if you are reading this I would like to say to
you is this case already solved not by the honorable court but by me the evidence are of precise
accuracy but are not recognized by justice itself thus bringing no justice to all.the reason of
why im trying to  solve this is purely for my entertainment.