If they answer questions with ''Honest to God", "On my Mother's Grave" and any such comments clarifying what they said with the mention of the Deity or their Children's Lives are red flags to the fact that they are lying/and or guilty at what they are accused.
Shakespeare in Hamlet Act 3, scene 2 wrote:
Both here and hence pursue me lasting strife,
If once I be a widow, ever I be a wife!
'Tis deeply sworn. Sweet, leave me here a while,
My spirits grow dull, and fain I would beguile
The tedious day with sleep.
Sleep rock thy brain,
And never come mischance between us twain!
Madam, how like you this play?
The lady doth protest too much, methinks.