Interesting part of "The Dead of Jericho"

"Where are you taking to me, Lewis?"Morse asked, as the police car drove fast through the streets of Oxford.
"Out of town, sir, Kidlington. A man's stabbed his wife there. He came into the police station and admitted it."
"It doesn't surprise you, Lewis, does it? In most murder cases there's an obvious person to accuse right from the beginning.Usually he's arrested close to where the murder happened, and in about 50% of cases he and the murdered person knew each other well."
"Interesting, sir," said Lewis politely.

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