Gaya Sraddha or pinda daan for him, and it is also believed that if any person sacrifice his life by any means then he or she first of all enter the Preth yoni then enter the pitar yoni and after doing pind daan or Gaya sraddha they got moksha under the foot of Lord Vishnu in Gaya,And it is also signifies in padma puran,Garud puran, and shri Bhagwat Gita. and it is neccesaary to perform Gaya sraddha or pind daan in Gaya from our Hindu Mythology .