From the linked articles, the killing took place in 2013, the sentencing and chair throw happened in 2014, and in 2015 an appeals court changed the sentence to 15 months in prison.
Edit: From another linked article, he fled to the UK but was extradited to Netherlands to serve the sentence in 2016, and in 2017 he was given early release to travel to Poland for the birth of his own child.
From the linked articles, the killing took place in 2013, the sentencing and chair throw happened in 2014, and in 2015 an appeals court changed the sentence to 15 months in prison.
Edit: From another linked article, he fled to the UK but was extradited to Netherlands to serve the sentence in 2016, and in 2017 he was given early release to travel to Poland for the birth of his own child.