Looking on the internet deeply has found these results:

He had a guilty conscience is the most popular phrase on the web.

He had a guilty conscience about his school report 10 results on the web	He had a guilty conscience 1620 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	He had a guilty conscience. Fear was a sin from the Old Sin Nature (OSN). When the man and woman sinned, they died spiritually, lost their fellowship with God,�... guilty conscience (=a feeling that you have done something wrong): It was a clear sign that he had a guilty conscience. Synonyms and related words�... A person's moral sense of right and wrong, viewed as acting as a guide to one's behaviour: he had a guilty conscience about his desires [ mass noun ] : Ben was �... Jan 10, 1984 ... ''He said he surrendered because he had a guilty conscience,'' said Lieut. Joseph J. Pirrello, head of the Midtown South Precinct detective�...

He had a guilty conscience about his school report

10 results on the web

He had a guilty conscience

1620 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

He had a guilty conscience. Fear was a sin from the Old Sin Nature (OSN). When the man and woman sinned, they died spiritually, lost their fellowship with God,�...
guilty conscience (=a feeling that you have done something wrong): It was a clear sign that he had a guilty conscience. Synonyms and related words�...
A person's moral sense of right and wrong, viewed as acting as a guide to one's behaviour: he had a guilty conscience about his desires [ mass noun ] : Ben was �...
Jan 10, 1984 ... ''He said he surrendered because he had a guilty conscience,'' said Lieut. Joseph J. Pirrello, head of the Midtown South Precinct detective�...