its good that your father has agreed to ensure safety and peace at home, subject to your withdrawing the complaint against him. Amongst family members faith is of prime importance. May be your father turns a new leaf after this incident. Your entering into agreement with your father is a family settlement agreement and is valid in the eyes of law and at any time you can seek redressal by filing complaint again against your father. Since you are going to withdraw your complaint against your father, the Police may insist for a copy of the agreement.