Source: The Curious Incident Of The Dog In The Night Time
“Except for cases that clearly involve a homicidal maniac, the police like to believe murders are committed by those we know and love, and most of the time they're right--a chilling thought when you sit down to dinner with a family of five. All those potential killers passing their plates.”
Kinsey Millhone
"A" Is for Alibi (1982)
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Sue Grafton 28
American writer 1940–2017Related quotes

2001
Context: Airports scrupulously apply the same laughably ineffective airport harassment to Suzy Chapstick as to Muslim hijackers. It is preposterous to assume every passenger is a potential crazed homicidal maniac. We know who the homicidal maniacs are. They are the ones cheering and dancing right now.
We should invade their countries, kill their leaders and convert them to Christianity. We weren't punctilious about locating and punishing only Hitler and his top officers. We carpet-bombed German cities; we killed civilians. That's war. And this is war.

As quoted in "A Newcomer to the Business of Politics has Seen Enough to Reach Some Conclusions About Restoring Voters' Trust", by Joe Frolik, inThe Plain Dealer (3 August 1996)
1990s

"They Hunger for Success" https://www.si.com/vault/1977/02/28/560840/they-hunger-for-success, interview with Sports Illustrated (February 28, 1977).

“All mankind, right down to those you most despise, are your neighbors.”
"Lost in Non-Translation" (1989), in Magic (Voyager, 1997) p. 270
General sources

Introductory
A Treatise on Man and the Development of His Faculties (1842)