Felonies committed under the influence of drugs can gain leniency in Peruvian courts.
The Peruvian court said that this would not hold up the case against Van der Sloot.
Mr. Polay was retried after a Peruvian court struck down the draconian antiterrorism laws under which he had been convicted.
In 2009, Fujimori was convicted by a Peruvian court for ordering the Gorriti kidnapping, among other human rights abuses, and sentenced to 25 years' imprisonment.
Last week, Ms. Higuchi asked a Peruvian court to order the President to stop his "psychological violence" against her.
Then, a Peruvian court ordered him to vacate.
If convicted by a Peruvian military court, whose judge's identity is shielded to protect against reprisals, Mr. Salazar faces life in prison.
In November 2005, a Peruvian court found him guilty of drugs-trafficking offenses.
Twice, Peruvian courts agreed.
But Newmont had persuaded a Peruvian court that it had the right to mine because it had acquired the concession years before.