Arrests were mostly made before the start of deportation or even before the order was issued. On 10 May 1944 Beria while requesting an approval of Tatar deportation reported to Stalin that 5,381 men had been already arrested in Crimea for "anti-Soviet" activity by that point:
https://bessmertnybarak.ru/files/2/imag ... 1944_1.jpg
There were not all arrested either. One should understand simple thing: collective reprisals based on ethnicity contradict to the very modern idea of legal system and contradicted to the legal punishments defined by the Soviet law. On the other hand reprisals based on individual deeds of certain person are fully legit. So arrests of suspected collaborators by the NKVD or SMERSH and further investigation and trials were fully legitimate and don't contradict to the idea of just retribution. It is a common knowledge that there was quite a number of civil and military collaborators in Crimea (not only Tatars), they participated in anti-partizan activity, they participated in genocide etc. You cannot ascribe Soviet reprisals to pure paranoia or saddism. Neither were reprisals against collaborators were limited to Crimea or Crimean Tatars (unilke ethnic deportations).Also, all Tatars were collaborators? and they all were killers?
It could mean different things. For a large portion of rank&file collaborators it meant some time spent in a filtration camp or 6 year settlement in Siberia. There were also a fair chance that charges would be dropped and the person arrested would be acquitted and released. The penitentiary term at that moment (1944) was mostly limited to ten years. And then, I understand that "slave" is a methaphore, but it's not a tehnically correct term. Anyway, punishments were mostly assigned after ivestigation and trial rather then by the very fact of arrest.In the Soviet system that certainly meant swift execution or 30 years as slave labor.
You see, you cannot say that police never killed anyone, but still shooting suspects on the streets is not a normal police function. Normally they are supposed to apprehend cirminals for investigation and trial and shoot them only in extraordinary circumstances. In a similar way blocking troops were to apprehend stragglers/deserters/suspect civilians for further sorting and investigation, while shooting someone was treated as an extraodinary event. And the use of weapons wasn't somehow limited to blocking detachments. Usual military patrol or sentries could use their arms against military personnel or civilians if they didn't follow their orders or warnings. Trial and punishment was a function of military tribunals. During the war OO NKVD recieved extraordinary rights for trial (albeit stipulated by extraordinary circumstances etc), however it was a different structure from NKVD troops. More than 99% cases of what you call "killed by blocking detachments" actually mean "apprehended by blocking detachments and sentenced by tribunals or OO NKVD".So NKVD troops never killed anyone? What about Blocking Detachments/Barrier units?