(NewsNation) — It’s been 12 days since 39-year-old Ana Walshe was last seen at her home in Cohasset, Massachusetts, as authorities continue to compile evidence in the investigation.

The wife and mother of three purportedly left home for a business trip in the early hours of Jan. 1 but investigators say she never boarded her plane bound for Washington, D.C.

Now, all eyes are on the 39-year-old’s husband, Brian Walshe — a convicted art fraudster — who has been arrested on suspicion of lying to police about his wife’s disappearance.

D.C. Police sources confirmed to NewsNation’s Evan Lambert that Brian was the suspect in a report from 2014, where Ana Walshe (then Knipp) reported that he threatened to kill her and her friends. Police say the victim refused to cooperate, so the case didn’t go anywhere.

Brian was also seen on surveillance video buying $450 worth of cleaning supplies at a home improvement store the day after his wife was last seen, prosecutors say.

Investigators found a bloody knife in the basement of the family’s home, although the source of that blood has not been identified.

Brian Walshe has not been charged in connection with his wife’s disappearance, but pleaded not guilty to a single count of misleading police in Quincy District Court on Monday.

Here’s the timeline of what’s happened so far.