By Len Ramirez

SAN JOSE (CBS SF) – No one has ever been arrested for the 2013 shooting attack on the PG&E Metcalf substation in South San Jose.

But according to published media reports, the Department of Homeland Security’s assistant secretary for infrastructure protection told an energy conference in Philadephia, “…there’s some indication it was an insider.”

The FBI, which is investigating the case, quickly called the report into question. The agency told KPIX 5, “There is a significant gap in what was said and what was reported…”

Other law enforcement sources told KPIX 5 that an inside job has long been suspected, due to the targeted nature of the attacks. Key fiber optic lines were cut, and someone with a high caliber rifle shot up several cooling radiators causing transformers to leak oil, overheat and shut down.

Security at the substation has been beefed up ever since. Patrols are more proactive, surveillance cameras are everywhere, pointing in all directions and an extra high concrete wall now surrounds all of the substation’s power equipment.