Brian Walshe allegedly watched a cuckold porn video days before the death of his wife — who prosecutors claim Walshe suspected of cheating — and Googled the so-called “trash-bag killer” after her slaughter.

Walshe, 50, viewed on his laptop a video about a “cheating wife” on Dec. 27, Massachusetts State Police Trooper Nicholas Guarino testified Tuesday, according to a report by CNN .

The explicit clip was allegedly viewed three days before Ana, Walshe’s wife and the mother of their three boys, disappeared forever around New Year’s Day 2023.

Jurors heard during opening statements Monday at the Norfolk County Superior Court trial in Dedham, Mass. that Ana was having an affair with another man, William Fastow.

Prosecutors claimed Walshe knew about the dalliance and had even searched

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