My understanding of the German process is very much on a par with yours so I think we are both "hypothetically speaking".
But I think you are way off track in thinking that the defence can veto charges.
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Prosecution
The first phase of a German criminal prosecution is pre-trial investigation to determine if there are grounds for a formal indictment. If a prosecutor determines that there is, the case is transferred to the appropriate German court, where the presiding judge decides if the evidence warrants a trial. This contrasts markedly from the US, where a judge will have little or no knowledge of the facts of a case until evidence has been introduced in the courtroom.
Pleas & Evidence
Formal pleas of “guilty” or “not guilty” do not exist in German trials. An accused party can’t plead guilty in order to receive a lesser punishment. Hearsay evidence and, under certain conditions, depositions of absent witnesses can be admitted as evidence in a German court. The attendance of witnesses and the production of evidence can be compelled.
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I found it interesting that hearsay evidence is allowed and also that court procedures are so different from ours -
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Though he has the duty of defending the accused to the maximum of his ability, a German lawyer is not as active in court as an American or British lawyer may be. In a German trial, the judge, not the defense counsel or the prosecutor, obtains the testimony of the witnesses. After the judge is finished, the prosecutor and the defense counsel will be permitted to question witnesses. The aim is to obtain the truth from witnesses by direct questioning rather than through the examination and cross-examination.
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I think the present court hold up is nothing to do with evidence and all to do with jurisdiction which I think must have been challenged, hence the delay.
My opinion