Hartley Howard was the pen name

Pen name

A pen name, nom de plume, or literary double, is a pseudonym adopted by an author. A pen name may be used to make the author's name more distinctive, to disguise his or her gender, to distance an author from some or all of his or her works, to protect the author from retribution for his or her...

 of Leopold Horace Ognall, a British crime novelist. Ognall was born in Montreal

Montreal

Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...

 and worked as a journalist before starting his fiction career. He wrote over ninety novels before his death in 1979. As Harry Carmichael, Ognall's primary series characters were John Piper (an insurance assessor) and "Quinn," a crime reporter.

Ognall's son Harry became a high court judge and conducted the hearings regarding former Chilean leader Augusto Pinochet

Augusto Pinochet

Augusto José Ramón Pinochet Ugarte, more commonly known as Augusto Pinochet , was a Chilean army general and dictator who assumed power in a coup d'état on 11 September 1973...

.

Harry Carmichael

Ognall created the pseudonym "Harry Carmichael" as an amalgam of the names of his immediate family: His son Harry, his wife Cecilia, his daughter Margaret, and his son Michael.

As Harry Carmichael, Ognall authored the following novels (with year of publication):

1. Death Leaves a Diary 1952
2. The Vanishing Trick 1952
3. Deadly Night-Cap 1953
4. School for Murder 1953
5. Why Kill Johnny? 1954
6. Death Counts Three (US Title: The Screaming Rabbit) 1954
7. Money for Murder 1955
8. Noose for a Lady 1955
9. The Dead of Night 1956
10. Justice Enough 1956
11. Emergency Exit 1957
12. Put Out That Star (US Title: Into Thin Air) 1957
13. James Knowland: Deceased 1958
14. A Question of Time 1958
15. ...Or Be He Dead 1959
16. Stranglehold (US Title: Marked Man) 1959
17. Requiem for Charles (US Title: The Late Unlamented) 1960
18. The Seeds of Hate 1960
19. Alibi 1961
20. Confession 1961
21. The Link 1962
22. Of Unsound Mind 1962
23. Vendetta 1963
24. Flashback 1964
25. Safe Secret 1964
26. Post Mortem 1965
27. Suicide Clause 1966
28. The Condemned 1967
29. Murder by Proxy 1967
30. A Slightly Bitter Taste 1968
31. Death Trap 1970
32. Remote Control 1970
33. Most Deadly Hate 1971
34. The Quiet Woman 1971
35. Naked to the Grave 1972
36. Candles for the Dead 1973
37. Too Late for Tears 1973
38. The Motive 1974
39. False Evidence 1976
40. A Grave for Two 1977
41. Life Cycle 1978