Print One of the biggest mysteries in recent San Diego political history is deepening, with fresh disclosures and a new lawsuit related to the infamous “Footnote 15" that roiled the elections for mayor and city attorney during the final weeks of the fall campaign. It’s still not clear who wrote the footnote that was inserted into a report to city officials last summer and that was leaked to NBC 7 San Diego, presumably to affect the looming election. But documents newly released by the city in response to a Public Records Act request appear to confirm that the City Attorney’s Office has known for months that there were multiple versions of the report of an investigation into the city’s lease-to-own purchase of the former Sempra Energy building at 101 Ash St.