Kroger board member Ron Sargent is taking the helm at the nation’s largest supermarket chain as questions about the former Kroger CEO continue.

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.

Kroger CEO Rodney McMullen is resigning following a probe into his personal conduct, the grocery chain said Monday.McMullen, who was both the chairman and CEO, is out after a company board investigation found that his personal conduct,