The grief-stricken mom of the three young girls found dead in Washington state believes their homeless Army veteran dad is more a “broken’’ man than a cold-blooded killer after he allegedly murdered them.

“It’s clear that something broke in him because no person can go out there and be a parent to three beautiful girls for nine years, pretend like he loves them, if he’s intending to kill them for nine years,” the mom’s lawyer, Arianna Cozart, told The Post on Friday, speaking on behalf of client Whitney Decker.

“It’s obvious something broken him. He’s a broken human, like anybody who could commit such a heinous act is, you know, I don’t know the better way to put it,” she said of Whitney’s ex and the girls’ dad, Travis Decker. 6

Travis remains on the run after killing the children

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