Intelligence is already being collected and analyzed.
Consequences of hostilities in Bucha / photo from UNIAN
The US will be able to identify the Russian units that committed the atrocities in Bucha .
It is reported by CNN with reference to the official representative of the United States. PauseUnmute
Identifying those involved “is now an extremely high priority” for US intelligence agencies, the official said.
Intelligence streams have been collected and analyzed using all available tools and assets since the atrocities became known, and the US has been narrowing down the suspects.
There is no certainty that the US will announce its findings publicly, the official said, and a decision could be made to leave it up to Ukraine. The US is also looking into possible indications that more than one unit or group of Russian fighters was present in Bucha at the time of the atrocities. The US is trying to determine if the atrocities occurred when one Russian unit retreated while another entered, the official added.
Russian atrocities in Bucha
After the liberation of Bucha, numerous photos and videos began to appear in the Kiev region, demonstrating the atrocities of the Russian invaders. In particular, the footage shows the bodies of dead civilians lying on the streets of Bucha. Some have their hands tied and gunshot wounds to the head.
The Russian Ministry of Defense denied any involvement in the brutal killings and torture of the inhabitants of Bucha. The Russian Federation also demanded to convene an emergency meeting of the UN Security Council on “provocations of Ukrainian radicals” in Bucha on April 4, but was refused.
(c)UNIAN 2022

Those criminals must be very scared going back into Ukraine on their next deployment. I think they know what will happen if they get caught by the Ukrainians. I, for one, would not turn them in to the authorities, I would make them pay my way.
Biden, Merkel and Stoltenberg are probably saying to themselves, “Thank God our people aren’t in Ukraine suffering those tortures!”
…
Blinded by their ignorance that if they were involved these tortures wouldn’t have taken place.