Victims rights stop at the boundaries of the rights of the accused. They boil down to being explicitly notified of changes of public information like court dates and release dates, the ability to be present for public proceedings, and reaffirming their protection from the accused WRT instruments like restraining orders.

https://www.justice.gov/usao/resources/crime-victims-rights-...

They don't extend to the decision making process for others' investigations and prosecutions.