He hasn't definitely killed him but yes he is a part of that accident mostly in a indirect way and he will get framed
I read that in the original version he was helping mandar actually after the accident and was completely innocent .
Itv is a lil more dramatic toh I guess he might have helped him only but somehow later mandaar escaped to ved or something like that I guess .
Ved has actually killed him and seems like he is veds accomplice.
I think more than the storyline its important how it unfolds for Raghvi , how they both deal with it and perceive it .
Somewhere perspective matters more In my opinion