[1] In 2004, the justice department initiated an independent probe into why Ouano's administration had not detected and taken action against a shabu drug lab in Mandaue.
Later, Ouano was also one of a number of mayors investigated for improper use of funds used for city improvements (specifically, decorative lampposts) for an Association of Southeast Asian Nations (Asean) conference held in the area in 2007.
[6] As of October 2008, the prosecution stated that they lacked sufficient evidence to take the lamppost case to trial,[7] and that the original charges were based on import documents that may turn out to have had falsified prices recorded.
[9] In 2019, the Sandiganbayan has dropped the graft charges[10] against the late Mandaue City mayor Thadeo Ouano accused of corruption in the purchase of “overpriced” lampposts back in 2007.
[15][16] In 2019, running under the banner of PDP Laban / One Cebu Party, Jonas Cortes allied with the descendants of Teddy Ouano to form the Cortes-Ouano alliance.