Tomb Raider Quest Guide
You get this quest from a severed arm by an icecream truck on your way to Norma Creed for whatever you're on your way to her for. This is a very simple quest that only has one minor hard part where you have to visit the cemetary behind the church and find Eric and Mindy's Grave.
Eric and Mindy's grave is at the northern end of Cemetary. Look for the baseball hat sitting next to a grave and you'll know you have the right one. I may upload pictures of where the grave is located and pictures of it soon but until then sorry!