Since a month or so after Abe's marriage, they'd fallen into some semblance of a regular exercise program, where a couple of days a week one would goad or abuse the other into agreeing to do something physical. After the macho need to demonstrate their awesome strength and breathtaking endurance to each other in the first few weeks had almost made them quit the whole thing because of all the aches and pains, they finally had arrived at a brisk walk a couple of times a week, or perhaps throwing some kind of ball on the weekend.

This morning they were eating up maybe three miles an hour walking on the path around Stow Lake in Golden Gate Park. It was a cool and clear morning, the sun visible in the treetops. A mist hung over the water, and out of it at the near shore a swan with her brood of cygnets appeared.

Glitsky was talking work, as usual, complaining about the politics surrounding the appointment of two inexperienced inspectors to his detail of elite investigators in reaction to the unexplainable renaissance of hit-and-run accidents in the City by the Bay. In the past twelve months, Glitsky was saying, ninety-three persons had been struck by motor vehicles within the city and county. Of these, twenty-seven had died. Of the sixty-six injury accidents that didn't result in deaths, fourteen were hit and runs.

"I love it how you rattle off all those numbers," Hardy said. "Anybody would swear you knew what you were talking about."

"Those are the real stats."

"I'm sure they are. Which is why I'm glad we're on this path and not the street where we could be senselessly run down at any moment. But how do these numbers affect your department? I thought hit and runs weren't homicides."

Glitsky glanced sideways at him. "Technically, they are when somebody dies."

"Well, there you go. That's why they come to you. You're the homicide detail."

"But we don't investigate them. We have never investigated them. You want to know why? First, because there's a separate detail cleverly named 'hit and run.'"