Kroger's CEO Rodney McMullen abruptly resigned after an investigation into his 'personal conduct'
1. Kroger replaced CEO Rodney McMullen due to unethical conduct. 2. Ronald Sargent assigned as interim CEO while searching for a permanent one. 3. Investigation revealed no associate involvement or financial impact. 4. Kroger will report fourth-quarter earnings on Thursday. 5. Sargent is a board member and former CEO of Staples.