My brother-in-law is under trial from past two and half years(entire duration , he is in jail).He along with his brother and parent were charged under section 498a , 307 , 302/306,304 B due to death of his sister-in-law (his brother's wife) after consuming poision.They all are named as main accused in FIR.
Initially they were charged under section 498a , 307 for which hearings were going on . After 10 months petitioner died and section 302 (306 as alternative) was imposed on them.Again hearing went on for 1 year and then judge decided to impose 304 B. now hearing is going on for 304 B.
Only victim and her parent's statement is against them , rest of the statement from doctor , police etc is in thier favour as she framed consipiracy.
What could be the probable verdict or punishment for this case?