How long has he been on the force? If it's been 5 years or so there's a decent chance he knew her husband. And even if not, he'd certainly know her son.

And probably her too. Several times a week she brings food around for the officers on duty. And usually stays to make them coffee, check to see if they've been getting enough sleep, how are their families, etc. Also is that a loose button on your jacket? Because I've got a needle and thread here somewhere...