The following was discussed here:
http://ozreport.com/forum/viewtopic.php?t=24924

Mario Campanella <<mcc>> writes:

We finished the analysis on Enio’s accident and produced an
English translation for the international community.

Some of you may know that there was a tragic accident in the last day of the
Brazilian Nationals and Open competition in Brasilia. Three of us took upon the
task of trying to understand what happened with Enio's accident. Our only hope
after this tragic loss is to add something to the safety of our sport. It was
never our intention to conduct a witch hunt, accusing the manufacturers of the
equipment or the glider. On the contrary, we respect a lot these manufacturers
and we hope that this document serves to improve the safety of free flight
equipment in general and in particular of those involved in this accident. This
document also advises pilots in learning more about your safety equipment
because we can not explain why the parachute did not open.

We do not have a hypothesis that explains beyond doubt what caused the accident
(actually four hypotheses are described in the document). What we are almost
sure about, is that two of the most common causes of accidents: material failure
and turbulence played a part in this accident. Enio was flying in high standards
of safety in the moment of the accident and we almost can exclude human error
from the factors of the accident. He did not cause the "tumble" as he was flying
fast at the time of the accident (66km/h), he had a wing in good condition (the
wing and the equipment were quite new including the parachute) and the "sprogs"
were probably in a safe position because there were reports of substantial bar
pressure prior to the last flight. The details you can read the document hosted
here:

http://www.decolar.org.br/Enio-Analysis-Accident-English.pdf  (English
version)

http://www.decolar.org.br/Enio-Analise-Acidente-Portugues.pdf 
(Portuguese version)

We encourage the discussion of the accident using the facts uncovered in our
analysis and we sincerely hope that through the community feedback we can get
closer to the truth behind this tragic accident.