Shallow Grave

Shallow Grave is a movie starring Kerry Fox, Christopher Eccleston, and Ewan McGregor. Three friends discover their new flatmate dead but loaded with cash.
When David, Juliet, and Alex are searching for a fourth roommate for their flat, they settle on the aloof Hugo. However, they soon find Hugo dead, with a large sum of cash being among his belongings. The three friends decide to keep the money, dismembering and burying Hugo's body. However, their newfound fortune begins to corrode their friendships, with each roommate resorting to manipulation tactics to scam the others out of the money.