I found this:

https://mobile.twitter.com/MrAndyNgo/status/1299086141329563648/photo/1

But, it doesn't have a screenshot of Jacob Marshall making that claim. All it has is Ngo's recounting of the claim, which could be ruled hearsay.

For a defense attorney to enter this into evidence, he will have to first depose Marshall and confront him with the claim and get confirmation under oath.

Then, he MIGHT be able to confront Grosskreutz with Marshall's statement during cross-examination, if the judge allows it.

I found this:

https://mobile.twitter.com/MrAndyNgo/status/1299086141329563648/photo/1

But, it doesn't have a screenshot of Jacob Marshall making that claim. All you have is Ngo's recounting of the claim, which could be ruled hearsay.

For a defense attorney to enter this into evidence, he will have to first depose Marshall and confront him with the claim and get confirmation under oath.

Then, he MIGHT be able to confront Grosskreutz with Marshall's statement during cross-examination, if the judge allows it.