Wipe out all evidence your species committed genocide by elimination of every person whose energy signature bears evidence related to it.
Everyone here ate someone whose energy signature does, so you'd better wipe them out too.
Better get them all.
Every. Last. One.
Criminals encouraging or requiring witnesses to violate protective custody conditions in order to defend themselves from attacks, criminal or legal.
Fabricated evidence stimulating legal or military or law enforcement attacks on witnesses in time travel trials.
Perp walk cameras
Not disappeared
Gulag
Men In Black
Secret Detention Center
Closed Court
Public Trial
Criminals who raped the same royal non-human woman also want to cover up evidence of their crimes by elimination of her descendants to remove visible evidence portrayed in those descendants' energy signatures.
Square Military Rank Insignia Militaries: you really think it's reasonable to invade in secret any foreign planet, much less one in a different universe, much less one in the oldest universe, much less one you don't even have accurate locational references to, such as star charts or maps? If you have square military rank insignia know that you come from outside this cluster of galaxies (The Bright Cluster of Galaxies), and are especially not from even any instance of this galaxy, referred to now as the Milky Way galaxy. Pictures of galaxies available through Google or Google Images or elsewhere on the Internet can easily confirm this; if you have images of your galaxy from the exterior. And we have incredible numbers of images of galaxies viewed from outside easily accessible via the internet or any computers connected to it or referenced on it. This level of technology on this planet in no way relates to your level of technological sophistication.
Time travelers manipulating laws or regulations or rules by changing history to make investigation into themselves not allowed.
Silence evidence and testimony of your crimes! For the good of the Volk! Siege Heil!
Trials requiring a jury but no records of testimony, which essentially only relates to juries witnessing actions and activities at a distance. Hearsay related to remote observation. Jury members have not personally analyzed their observation equipment and are not experts on foreign places planets or times. Asked to conclude on matters in which they are not sufficiently expert enough to render valid conclusions.