The New York Times makes very clear that Glafira Rosales has given Federal prosecutors what they want, that’s why she was released on bail:

Federal prosecutors handling the case against an obscure art dealer charged in one of the most audacious art frauds in recent memory told a judge on Monday that they expected more arrests in the continuing investigation. They also said they expected the case against the art dealer to be resolved soon.

Prosecutors Expect More Arrests in Art Fraud Scheme