“Computer, huh? That gives you all the answers?”

“Some of them.”

“Whatever happened to experience and trusting hunches and gut instincts?”

It wasn’t a question that was waiting for an answer. Clewiston added the lengths of the four skid marks he had measured and then divided by four, coming up with an average length of sixty-four feet. He entered the number into the calculator template.

“You said the vehicle is only two months old?” he asked Fairbanks.

“According to the registration. It’s a lease he picked up in January. I guess he filed for divorce and went out and got the sports car to help him get back in the game.”

Clewiston ignored the comment and typed 1.0 into a box marked B.E. on the template.

“What’s that?” Fairbanks asked.

“Braking efficiency. One-oh is the highest efficiency. Things could change if somebody wants to take the brakes off the car and test them. But for now I am going with high efficiency because the vehicle is new and there’s only twelve hundred miles on it.”

“Sounds right to me.”

Lastly, Clewiston typed 9.0 into the box marked C.F. This was the subjective part. He explained what he was doing to Fairbanks before the sergeant had to ask.

“This is coefficient of friction,” he said. “It basically means surface conditions. Mulholland Drive is asphalt base, which is generally a high coefficient. And this stretch here was repaved about nine months ago-again, that leads to a high coefficient. But I’m knocking it down a point because of the moisture. That mist comes in and puts down a layer of moisture that mixes with the road oil and makes the asphalt slippery. The oil is heavier in new asphalt.”

“I get it.”

“Good. It’s called trusting your gut instinct, sergeant.”

Fairbanks nodded. He had been properly rebuked.

Clewiston clicked the enter button and the calculator came up with a projected speed based on the relationship between skid length, brake efficiency, and the surface conditions. It said the Porsche had been traveling at 41.569 miles per hour when it went into the skid.