Democratic Sen. Robert Menendez allegedly starting taking bribes from a wealthy donor shortly after he entered the Senate in 2006, federal prosecutors assert in a new document.

Menendez’s bribery and corruption trial is set to begin next week. In preparation for that, Justice Department prosecutors filed a new document Wednesday laying out their case against the New Jersey senator, as well as Dr. Salomon Melgen, his alleged co-conspirator. Melgen has already been convicted in a separate case of bilking Medicare but has not been sentenced yet.

Menendez’s fate — and the what happens to his Senate seat if convicted — is part of the drama surrounding the high-profile case. Menendez has denied all allegation of wrongdoing, and he has denied any talk of a plea deal with the Justice Department.

The new documents lay out the roadmap for the government’s case against Menendez.