Mental Torture by Brother's Wife

Hello Sir....I'm Deepak We are 2 Brothers.My Brother's Marriage have done in 2010....After Marrige Brother's Wife starting Mentally Torture in my Family.....My Brother is very innocent. She blackmailed our famliy like that she Will Die By Kerosine Oil....we were in tension.....we Filed complaint against her but No Result.....She was demand to living seperatly...My Father gave her 1/2 part with Lands.....My Brother and Wife living seperatly........After some month she started torturing....she abused to my parents......I heared but she was Lady.....I can't do anything.....I was helpless....bcz any Son can hear abuse on his parents.....My Father is Heart Patients....Age 62.....In 22nd July 2018....She is aruguing with my brother.....nd My Brother have go away from home.....We Filed missing complaint to police but There is no any news regarding my brother.....My Brother is missing....7Days ago She is filed fake FIR to police station against me.....of Harrasment...police hear Lady's talk.....My Parents in tension.....She is demanding Half Property in my Mother's Property.....nd Also share in our Home.......Plz tell me what can I do.....