Subway said they had no signs ex-spokesman Jared Fogle was paying for sex with minors

Subway completed an internal investigation into former spokesman Jared Fogle on Friday, announcing they had received one "serious" complaint against him in 2011, but that it didn't imply criminal activity, The Washington Post reports.

The sandwich chain suspended ties with Fogle in July when authorities raided his house as part of a child pornography investigation. He has since pleaded guilty to possessing child pornography and soliciting and paying for sex with minors between 2007 and 2015.

During the course of the investigation, Subway said they reviewed more than 1 million comments submitted to customer relations as well as documents and interviews with company employees and management.

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"The harm he caused so many is inexcusable, and we continue to extend sympathies to his victims and their families," a company statement read.