David Alexander Gimelfarb, a 28-year-old doctoral student in psychology in Chicago, was last seen on Tuesday, August 11th at 10am in the Rincon de Vieja National Park outside of Liberia in Costa Rica. On Tuesday night after closing hours, his car was found in the parking lot, with no evidence that he has returned since.
David's parents have been in Costa Rica searching for their son with the local Red Cross since Wednesday, August 12th. On August 18th, the U.S. Government and the U.S. Costa Rican Embassy joined in the search, and on August 19th, ResQglobal, an "independent, neutral organization providing an immediate international rescue service for victims of disaster worldwide," arrived to assist.
Since then, a Facebook group has been created in order to pool information on David's disappearance and the ongoing search, including links to news stories (ie. "Chicago Grad Student Missing in Costa Rica" from August 16, 2009) and a list of all visitors who signed in at the Park register on August 11th. This social networking group also aims to dispel some of the misinformation that's been circulating in the media.
As of the latest update on September 9th, a team was able to get to a lagoon at the bottom of a crater, where they found some red foam rather than what was thought to be a body floating face-down when it was first spotted by police.
The Facebook group can be found at: http://www.facebook.com/home.php?#/group.php?gid=235888305359. This is an open group anyone can join.
Anyone with information pertaining to this search should send an email to firstname.lastname@example.org.