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.

The supermarket chain said Rodney McMullen’s conduct wasn’t related to its financial performance or operations but it was inconsistent with its ethics policy.

Rodney McMullen, Kroger chairman and CEO, is stepping down after an internal investigation into his personal conduct.