file application before family court and seek custody of your minor son

2) you cna go and visit your minor son .

3) if in laws refuse to permit you to meet your son seek police assistance in this regard

In such cases the child is often played as pawn in the ongoing war.

Since the child is with his maternal grand parents you will have to file a suit for custody of the child.

In such custody suit the court is only concerned with the welfare of the child.You being the father dies not enjoy any extra rights.

So in the suit if you could prove that future of the child is not secured with his grand parents then you can get visitation rights.Elsenot.

However during the pendency of the suit which takes some time you will get visitation rights to meet the child periodically.

1. merely only filing of FIR and taking judicial cognizance of the case does not preclude father from custody of his child, unless it is proved that father's custody may not be in welfare of the child.

2. you can file a petition before the district judge court under guardianship and wards act for custody of the child.

Under the situation you need to file a petition seeking child custody on the basis of the natural guardian to the child being the biological father to the child.

You have all the rights to take care of your child, the pending criminal case cannot be a reason for dismissing your petition.

You may file a child custody case under the GW Act.

Consult a local lawyer and proceed as per his advise