Second update,
...
Song Gang naturally recognized this person; he was one of Li Rui's underlings who had lived with them for over a month. Although Song Gang was somewhat vigilant, now that the enemy was gone, he had let his guard down slightly.
Moreover, he had seen Cao Chun leave and naturally knew that Li Rui wouldn't have left him here alone. Estimating the time, he realized that the police were nearly upon them, and he needed to leave quickly.
Clearly, the car had been left here especially for him, and "Wigan" was an alias he had chosen, just as Cao Chun had taken the name "Mike."
The nickname "Wigan" was known only to Li Rui's underlings who lived with them. As for Li Rui himself… he had never actively contacted them from the beginning, although he knew their identities, he wouldn't disclose them.
It was this very nickname that made Song Gang not suspect the underling's identity because the way he spoke was so natural, not as if he had been coerced.
But...
Bang~~
