How do you find info on your dad fallout 3

NOTE:This answer may contain spoilers if you haven't made it that far in the game.

Okay, to find info on your dad, head to Megaton. This is a town just outside Vault 101. Head up to the highest level and speak with the owner of Moriarty's Saloon, Colin. He'll tell you to go and mug an ex-hooker of his who "ran off" with a bunch of caps. If you do this, he'll just make you pay him for the info. I suggest taking the Lady Killer perk when you level up, and sweet talk Nova into giving you the information. She'll give you Colin's terminal password. Access the computer and it'll say that your dad has gone to Galaxy News Radio. Follow the map markers until you run into a group of people dressed in high tech armor. This is the Brotherhood of Steel. They will help you fight your way to GNR, at which point there is a final battle with the Super Mutants and a Behemoth. Head inside and speak to Three Dog. He'll ask you to help him, but trust me, refuse, and just head to Rivet City. An easy way to get there is to jump in the river and swim through the D.C ruins until you see a big boat. Enter this boat, and ask around about Dr. Li. She'll tell you where your dad is.