Oh, but I hate it more
when a traitor, caught red-handed,
tries to glorify his crimes.

[μισῶ γε μέντοι χὤταν ἐν κακοῖσί τις
ἁλοὺς ἔπειτα τοῦτο καλλύνειν θέλῃ.]

Sophocles (496-406 BC) Greek tragic playwright
Antigone, l. 495ff [Creon] (441 BC) [tr. Fagles (1982), l. 552ff]
    (Source)

Original Greek. Alternate translations:

Howbeit, to me it is no less abhorrent,
When, caught in criminality, the culprit
Seeks with fine words to beautify his deed.
[tr. Donaldson (1848)]

More hateful still the miscreant who seeks
When caught, to make a virtue of a crime.
[tr. Storr (1859)]

But not less hateful
Seems it to me, when one that hath been caught
In wickedness would give it a brave show.
[tr. Campbell (1873)]

But, truly, I detest it, too, when one who has been caught in treachery then seeks to make the crime a glory.
[tr. Jebb (1891)]

I cannot bear to see the guilty stand
Convicted of their crimes, and yet pretend
To gloss them o'er with specious names of virtue.
[tr. Werner (1892)]

But verily this, too, is hateful, -- when one who hath been caught in wickedness then seeks to make the crime a glory.
[tr. Jebb (1917)]

But now much worse than this
Is brazen boasting of barefaced anarchy.
[tr. Fitts/Fitzgerald (1939), l. 390ff]

The criminal who being caught still tries.
To make a fair excuse , is damned indeed.
[tr. Watling (1947), l. 414ff]

I hate it too when someone caught in crime
then wants to make it seem a lovely thing.
[tr. Wyckoff (1954)]

But this is worst of all: to be convicted
And then to glorify the name as virtue.
[tr. Kitto (1962)]

But how I hate it when she's caught in the act, And the criminal still glories in her crime. [tr. Woodruff (2001)]

I hate it when someone, caught in ugliness, afterwards wants to make it look pretty. [tr. Tyrell/Bennett (2002)]

And there’s nothing I hate more than when someone is caught committing a crime and tries to hide it by embellishing it with sweet words.
[tr. Theodoridis (2004)]

How I despise
a person caught committing evil acts
who then desires to glorify the crime.
[tr. Johnston (2005), l. 562ff]

I, for my part, hate anyone caught in the act who tries to beautify his crimes thereupon.
[tr. Thomas (2005)]

I hate it when someone is caught in the midst of their evil deeds and tries to gloss over them.
[tr. @sentantiq (2020)]