than a fear of being labelled as "konfindent" could've stopped them from reporting it to the police.
Basically yes. People in general don't grass up colleagues, certainly don't run their names by Interpol and Poles don't tend to dob in their own unless there's an immediate cash reward or some other personal advantage.
Looks like the extradition has gone through:
A judge at Westminster magistrates' court today ruled that Kupiec, 28, should be extradited to Poland.
He had been named as a suspect on Interpol's wanted list and a warrant issued for him on charges of allegedly causing death by manslaughter or murder, assault or maltreatment, and theft.
If convicted of the offences in his home country, he could face nearly 40 years in prison, a judge heard
dailymail.co.uk/news/article-3534229/Polish-man-wanted-murder-working-Subway-500-yards-police-station-extradited-face-trial.html