Tā shuōhuǎng bèi fāxiàn hòu, gǎndào fēicháng xīnxū.
After being caught lying, he felt very guilty.
Tips
usage
心虚 covers two slightly different senses: (1) having a guilty conscience - knowing you've done wrong; (2) lacking self-confidence. Context usually clarifies which is meant. The first is more common in everyday speech.
