Entry in progress—B.P.

16 March 1993, Denver (CO) Post, “Defendant ‘wasn’t there’” by Howard Pankratz, pg. 2B:
“Crimes conceived in hell don’t have angels as their witnesses,” said Little.

24 August 1994, Marietta (GA) Daily Journal, “Kesserling jury deliberating” by Dennis Smith, pg. 2B, col. 5:
Admitting that some of the witnesses in the retrial were of questionable character, Chief Assistant District Attorney Jack Mallard said: “Crimes conceived in hell don’t have angels as witnesses.”

Google News Archive
2 May 1995, Milwaukee (WI) Journal Sentinel, “Riegel jury retires for night” by Lori Skalitzky, ‎pg. 3B, col. 5:
“I (Assistant District Attorney William Roach—ed.) told you from the get-go I don’t like Mr. Zamzow. I don’t know anybody who does. But crimes conceived in hell don’t have angels as witnesses.”

Tampa Bay (FL) Times
Pasco man convicted of murder in 2011 death of Hudson drug dealer
Jon Silman, Times Staff Writer 
Friday, May 17, 2013 7:41pm
(...)
He (Assistant State Attorney Chris Sprowls—ed.) took issue with Grieble’s characterizations of Lewka and the other witnesses as drug addicts and the implication that somehow it muddied their testimony.

“There’s an old saying,” he said. “Crimes conceived in hell don’t have angels for witnesses.”