Jury in Brian Walshe’s murder trial heard testimony from the man who had an affair with his wife. Here are the takeaways

Brian Walshe enters a Dedham, Massachusetts, courtroom for the fourth day of witness testimony in his murder trial, when jurors heard from the man who was having an affair with Walshe's wife, Ana Walshe, before she vanished around New Year's 2023. Matt Stone/The Boston Herald/AP

Brian Walshe on Thursday came face-to-face for the first time with the man who had been having an affair with his wife before her death, as he took the stand to testify in Walshe’s murder trial.

Washington, DC, real estate broker William Fastow is a key witness for the prosecution, as his testimony could offer jurors a potential motive while they weigh whether Walshe killed his wife, Ana Walshe, around New Year’s Day in 2023.

The jury also saw surveillance footage and GPS data from Brian Walshe’s phones that