http://www3.signonsandiego.com/stories/2009/may/13/bn13tjdead-update/?metro&zIndex=99105
Four who went to party in Tijuana found dead
By Sandra Dibble Union-Tribune Staff Writer, Pauline Repard Union-Tribune Staff Writer
Originally published 10:29 p.m. May 13, 2009, updated 12:07 a.m., May 14, 2009
TIJUANA – Authorities are investigating the slayings of four young people, at least three of them from Chula Vista, whose bodies were found early Saturday inside a van parked in a residential neighborhood of Tijuana..........
Above is a link to this story.
From what has been reported and what I have heard on the news, this is the story.
The one I posted from the SDUT is 2 days more current than your link.
It seems that they are still investigating to find the truth.