KH4L1$T4N1 you got your info mixed up in parts, it wasnt Sandhu that General Labh Singh was referring to, it was a police tout, who was in their own organization.
However, its widely accepted with Jujharoo's circles that Sandhu was an agent, whether its true or not is for sangat to research and decide. Keep in mind that Sandhus wife was Shaheed in bluestar, family protection is a priority for traitors, why wasn't this the case here? There was a large element of doubt placed on Sandhu, which is why they had him killed. Gurjit Singh Kaka (SSF) & many other Singh's where also suspected of being agents. The govt played us well.
PS: Bhai Gurmukh Singh Nagoke (KCF) completed the hit on Sandhu.