though he proved himself innocent...but then i realised...one thing...
when simmi was confronted under doubt being involved with ashok as khabri...she proved herself innocent...as the flashback was shown how she met param n blah blah...soo its clear that she waz saying the truth...
But when pathak was crossquestioned n confronted...and he too cooked up the story about trisha...but thr was no flashback...or can it be possible that...
Just my guess...may be rinki cam to know about trisha's involvement in bad habits of gambling and she must have confronted her for the same and she wanted to tell trisha's truth to family raman but ut of fear trisha must have unintentionally murdered her...which pathak may have seen of came to know somehow...and now ashok came to know about trisha's gambling involvement...and thrwise he must be taking advantage of the situation n making pathak to do all this...
And also ashok as we all know is the one behind watchmen's death...i think pathak did knew about it...as ashok told him that he had to make watchman kill as he saw him on terrace throwing that stone...and we all kknow as ishita discussed with her 3 idiots gang that mrs bhalla invited pathak too on diwali but he didnt came...
P.S...all things looks sooo messy that even i dont know what have i written makes some sense or not...neither of Raman's blood relation can kill him..Pathak is not his own real brother..soo probability is thr that he can try to kill or harm ...afterall he might loves Trisha his love life more than raman...raman ka kya h family h uski poori but he lives only with trisha as she is his only family..
He might be doing it under pressure but he can do it..