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Brian Walshe -- the Massachusetts man on trial for allegedly murdering his wife Ana --- is a narcissistic sociopath who reveled in watching cheating wife porn after he suspected his spouse of stepping out on him ... according to Dr. Phil . Play video content

TMZ caught up with the famous doc amid Walshe's murder trial ... and Phil walked us through Walshe's penchant for browsing Pornhub looking for smut films depicting a cheating spouse , which Walshe suspected Ana of being before she disappeared in 2023.

Walshe has pleaded guilty to disposing of Ana's body and misleading police ... her remains have never been found. Prosecutors charged Walshe with Ana's murder despite his denials he killed her.

Today, on day four of Walshe's criminal

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