Accidental voicemail of a partner explaining her deceit

I need help with audio from a security phone camera. The audio is in WAV format and needs enhancement to clarify suspicious sounds.

Requirements:
- Focus on enhancing clarity of suspicious sounds
- Background conversations and noises should remain as is
- Deliver in the original WAV format

Ideal Skills:
- Experience with audio editing software
- Strong understanding of noise reduction techniques
- Ability to enhance specific audio elements without affecting others

Please provide samples of similar work.