My friend recently just died, how to remove his Facebook?

[Josh]

You cannot actually delete another person's account. You would have to know the username and password and Facebook keeps user information confidential at all costs; even if the user passed away.

However, you can report your friend to Facebook to memorialize his profile. "It is our policy to memorialize all deceased users' accounts on the site. When an account is memorialized, only confirmed friends can see the timeline or locate it in Search. The timeline will also no longer appear in the Suggestions section of the Home page. Friends and family can leave posts in remembrance."

Here is the link: http://www.facebook.com/help/?page=189165357807678

Sorry for your loss. I hope this helps.