1. With proper permission of the Trial Court, the legal heirs of the deceased "complainant" can be substituted, as "legal representatives" in the case. The complainant's private filed criminal case (not police/state filed case) shall stand abated, IF the "legal representatives", do not file substitution application, in Trial court.
2. The Respondent, has no jurisdiction to object in above matter. Further in revision /appeal, there is no need of complainant, since the revision /appeal court shall look into the matter only on merit of the trial court order and no new trial /evidence /witness is permitted, UNLESS & UNTIL the matter is remanded back to Trial court, for fresh trial, on point of law.
Keep Smiling .... Hemant Agarwal