The civilian massacre in Bucha is obviously that.

On March 31, the Mayor of Bucha posted a video on Twitter where he announced that the Russian military had pulled out of his town.

https://www.youtube.com/watch?v=M1yoMRLbuuE

You can see, on March 31, he looked cheerful and at no time did he mention anything about civilians laying dead in the streets all over town. Obviously that is because it had not happened yet.

If you can understand the language, Ukranian MP Ilya Kiva will tell you why those bodies were not found until April 02. This was a false flag atrocity crime planned by British Intelligence (M16) and the Ukrainian SBU and executed two days after the Russians left, on April 02. https://t.me/intelslava/24353

Interestingly the British Government website records that Boris Johnson and Zelensky had a phone conversation that same day, April 02. Not hard to guess what they were talking about. https://www.gov.uk/government/news/pm-call-with-president-zelenskyy-of-ukraine-2-april-2022