matter of Property & assets after husband death / suicide

Religion: Hindu one of my best friend marriage was just 4 months ago & he commit suicide now because of Bride side continuous interference & her father's warning of lodge of false Dowry case and mental & physical harassment case against his whole family & demanding a 15 Lacs. he discussed this issue with me several time but i didn't understood the seriousness. but i finally realize that his wife was really not a good women. in his suicide note he mention how much his father in law torture him a lot. he also claimed that he don't want to share joint land property with his wife & give all rights to his brother. all property where he lives was on the name of his mother also don't want to give a single penny to her from his own & fathers property & also from ancestral property. His main concerned was that after his death bride side will not trouble his old parents as both are suffering from paralysis & asthama condition. & his brother & sisters.To what extent she can go with law.