Wait a minute here. . .they are investigating the Russians and gave them original evidence with no back-up copies? They make the Keystone Kops look professional.
1. The prosecution shares information with the defense, as required by law in a criminal trial.
2. The defense alters the information -- not for the purpose of misleading anyone involved in the case, but for the purpose of leaking it to the media and the public to undermine the prosecution in the "court of public opinion." I am sure there is nothing illegal about this.
3. The prosecution is almost certainly precluded -- by law, or by rules of the court -- from going to the media to correct the record by sharing the accurate information.