Hi,

On urgent basis, file complaint to police for police protection of life and property. Also write to SDM to get the property released from uncle.

1. Since a crime has occured you or father must lodge a complaint in writing with the Police on which basis a FIR under section 323, 506, 504 IPC can be registered agaisnt his tormentors.

2. If the Police does not register FIR you can get ot done through the court of the Magistrate.

3. As regards forcible occupation of your land the remedy is a civil suit for recovery of possession.

Your father should file application before senior citizen tribunal seek protection order restraining your uncle , their family members from disturbing his possession of house 

2) also file police complaint of criminal intimidation under section 506 of IPC against his relatives 

Your father should file case of criminal trespass against his brother and their children 

also suit for eviction 

See firstly father can file a police complaint and can seek protection against the said uncle and sons .

Further he can meet or write letter to SP ans District magistrate for speedy relief as he is a senior citizen his rights will be protected.

And as far as land is concerned for that an FIR for illegal encroachment can be made and civil suit for taking possession of same can be filed.

There are certain protections available for the senior citizens but most of the crimes are dealt in the similar way.

As these aquisitions belong to the property and threatening he can go to the police station and lodge complaints.

1. As per the information mentioned in the present query, makes it clear that your father has been harassed in every possible way by your uncle and his sons.
2. I advice you to file a police complain as well as a complain in a senior citizen cell of your area.
3. Once you do that then whenever in future if they again create problem just give a 100 number call.
4. And for the property, you may file a civil suit for having right in that property.

At any time your uncle and his sons repeat this behaviour by way of being violent and harassing and abusing your father, your father must immediately report the matter to the Police.  

As regards to the land forcibly occupied by your Uncle and his kins, your father must file a civil suit for dispossession besides a detailed police complaint in the matter.

There are laws protecting elderly people who are subject to harassment. This includes police protection as well as legal protection. You may file a complaint before the relevant police station and take recourse.

File an FIR immediately against them. Also invoke the provisions of senior citizens Act against such inhuman members. Police will come at your residence and take FIR.

If your uncle and his sons have assaulted your father and turned violent on more occasions nothing prevented your father from lodging a criminal complaint against them with the local police.

If the local police is not effective then he could have approached the top police officer of the district for relief and remedy against such atrocities done on him by them.

You may initiate process to lodge criminal complaint against them and for the time being let your father not reside in that house after giving the complaint because they may repeat such incidences in the name iof wreaking vengeance.

Also my uncle and his sons have forcibly occupied some land property that legally belongs to my father, cinior citizen.

He can approach senior citizens welfare tribunal and give a complaint about this, they will immediately restore the property by an order with the help of local police.