Folha Online
http://www1.folha.uol.com.br/folha/c...5u126635.shtml
They are reporting this morning that the Legacys planned route involved a level change when they turned onto airway UZ6 from UW2, from FL370 to FL360. Mr Sharkeys account indicates that the Legacy was still at FL370 shortly before the collision.
They also state that ATC were receiving primary returns (no altitude or identification) only from the Legacy for 15 minutes at or around the time of the collision and that the pilots of the Legacy reported a communcations failure shortly before the collision. The reason being floated for this is that the pilots were showing off for the new owners and had turned off TCAS for this reason.
Folha also comments on possible communications errors between control centres and the fact that this region is not noted for reliable radar and communications cover.
As ever, there will be a sequence of events that worked together to bring down GOL 1907, some human, some technical, the avoidance of any one of which would have saved lives. The full details will only be known when the FDR, CVR, and ATC data has been analysed.
BTW, being held after a fatal accident is normal here, and in many other countries, and is not an indication of guilt or culpability.