Kudaeva is intoxicated

Kudaeva is intoxicated

Kudaeva, in a state of intoxication, approached Uzdenova in order to seize property in a trolleybus. Kudaeva tore the gold chain from Uzdenova’s neck and, using the trolley bus stop, jumped out of the door and tried to escape, but was detained by Uzdenova.
Identify the stage at which the criminal act was completed. How does it affect criminal liability in this situation? Justify your answer.

Additional information:

After payment you will be available a link to the solution of this problem in the file of MS Word. It should be noted that the problem solutions put up for sale were successfully handed over in the period 2009-2019 and could be outdated. However, the general algorithm will always remain true.