It’s the little things you do together, as Stephen Sondheim reminded us, in “Company,” that make perfect relationships. He listed some of the things: “concerts you enjoy together, neighbors you annoy together, children you destroy together,” and so on. There’s a whole potential movie, right there, and I was hoping that the new John Lee Hancock film, “The Little Things,” might be a riff on Sondheim’s acerbic song. No joy. Instead, it’s a cop drama about a serial killer, decked out with the customary frills: murders you commit together, clues you try to fit together, ways to get your shit together. And so on.
The film stars Denzel Washington as Joe Deacon, known as Deke. The year is 1990, and Deke is a deputy sheriff in Kern County, California, but…