Kroger CEO Rodney McMullen is resigning immediately from the grocery store chain following an investigation that found his personal conduct was “inconsistent” with the company’s ethics policies.

The grocery chain said it had investigated its chief executive, Rodney McMullen, and found that his actions were “inconsistent” with its business ethics policy.

Kroger Co. replaced Chief Executive Officer Rodney McMullen following an investigation into his personal conduct, casting a shadow on the supermarket operator’s path forward following a failed deal and a string of management departures under the longtime leader.