It is from the link.
After a brief marriage in the early 1990s, Heuermann has been married since 1996 to wife Asa, with whom he has a daughter — a graphic artist — and a stepson, according to his 2018 testimony. His wife, he testified, dropped him off at a nearby train station in the mornings.
Once more the link: A new look at an old clue helps investigators arrest the man accused of Gilgo Beach murders
Ahh, thanks. So the "testified" was referring to the 2018 civil case. I thought I missed something!