Video link for the court proceedings in Wisconsin.
It starts out with Professor Halderman on the witness stand:
EDIT: that's interesting to watch, it's full testimony with examination and cross examination, re-direct and re-cross, and then the judge asks questions, and then more witnesses.
It's Professor Halderman's sworn testimony that he "does not have confidence" in using the scanners for the recount, and that he would have full confidence in a hand recount.
Under cross examination, he testifies that he has no evidence there was any malware in any Wisconsin ballot scanners. But he testifies that the proof of whether the scanners were compromised or not, can only be known if a hand recount is done (comparing the paper record to the digital record).
Earlier in the testimony, he brought up malware hacking in Ukraine's election and the defense objected and the judge sustained the objection, I think that meant he had to stick to hacking done only in this country in his testimony.
Also earlier in the testimony he goes into technical details about the scanners and risk to hacking, and why he thinks hacking was a bigger risk in this election year.
I'm not sure what the judge's final ruling was about the hand recount, or if the hearing is still ongoing.