The first thing that dies in war is the truth.

Amnesty International, the UN and Human Rights Watch documented very well how Ukrainian extremists and paramilitary organizations tortured and put people randomly into detentions after the allegedly USA friendly government was installed in the Ukraine in 2014. Here are some money quotes which I found interesting:

September 2014:

“Members of the Aidar territorial defence battalion, operating in the north Luhansk region, have been involved in widespread abuses, including abductions, unlawful detention, ill-treatment, theft, extortion, and possible executions.
The Aidar battalion is one of over thirty so-called volunteer battalions to have emerged in the wake of the conflict, which have been loosely integrated into Ukrainian security structures as they seek to retake separatist held areas.
In the course of a two-week research mission to the region, an Amnesty International researcher interviewed dozens of victims and witnesses of the abuses, as well as local officials, army commanders and police officers in the area and representatives of the Aidar battalion.

Our findings indicate that, while formally operating under the command of the Ukrainian security forces combined headquarters in the region members of the Aidar battalion act with virtually no oversight or control, and local police are either unwilling or unable to address the abuses.”

https://www.amnesty.org/download/Documents/8000/eur500402014...

May 2015:

“On the pro-Kyiv side, Amnesty International has particular concerns about Right Sector, a volunteer militia created by a pro-Kyiv nationalist political grouping .2 Former Right Sector prisoners detailed a horrifying spectrum of abuses, including mock executions, hostage­taking, extortion, extremely violent beatings, death threats and the denial of urgently-needed medical care. Using an abandoned Pioneer camp near the village of Velykomyhailivka, near Dnipropetrovsk, as an ad hoc prison, Right Sector has reportedly held dozens of civilian prisoners as hostages, extorting large amounts of money from them and their families”

https://www.amnesty.org/en/wp-content/uploads/2021/05/EUR501...

August 2016:

“On 24 June 2016, a number of IDPs, together with a ‘self-defence’ group in Odesa, seized a communal building after numerous attempts at obtaining support from the regional authority to solve their housing problems.143 OHCHR notes a worrying tendency to resolve pressing socio-economic and political issues with the help of voluntary battalions and paramilitary groups.”

https://www.ohchr.org/Documents/Countries/UA/Ukraine15thRepo...

July 2016:

“In most of the nine cases Amnesty International and Human Rights Watch investigated, pro-government forces, including members of so-called volunteer battalions, initially detained the individuals and then handed them over to the Security Service of Ukraine (SBU), who eventually moved them into the regular criminal justice system. Some were later exchanged for persons held by separatists and others released without trial.

In three cases detailed in this report the SBU allegedly continued the enforced disappearances, keeping the individuals in unacknowledged detention for periods ranging from six weeks to 15 months. One individual was exchanged, the other two simply released without trial. With regard to two of the individuals, there is no record whatsoever of their detention.

The June 2016 UN report noted that the cases of incommunicado detention and torture brought to their attention in late 2015 and early 2016 “mostly implicate SBU” and specifically mentioned the SBU compound in Kharkiv as an alleged place of unofficial detention.

Based on the research findings detailed in this report, Amnesty International and Human Rights Watch believe unlawful, unacknowledged detentions have taken place in SBU premises in Kharkiv, Kramatorsk, Izyum, and Mariupol. We received compelling testimony from a range of sources, including recently released detainees, that as of June 2016 as many as 16 people remain in secret detention at the SBU premises in Kharkiv. Ukrainian authorities have denied operating any other detention facilities than their only official temporary detention center in Kyiv and denied having any information regarding the alleged abuses by SBU documented in this report.

Most interviewees told Amnesty International and Human Rights Watch they were tortured before their transfer to SBU’s facilities. Several also alleged that after being transferred to SBU premises they were, variously, beaten, subjected to electric shocks, and threatened with rape, execution, and retaliation against family members, in order to induce them to confess to involvement with separatism-related criminal activities or to provide information.“

https://www.hrw.org/report/2016/07/21/you-dont-exist/arbitra...

“Members of extreme right-wing groups also conducted forceful and discriminatory actions against the Roma community. On 18 April, members of C14 extreme right-wing group forcibly confined Roma people at the main train station in Kyiv, checking IDs and searching personal belongings.128 Also, following threats to forcefully evict Roma residents, members of C14 burned down a Roma camp in Kyiv on 21 April. The police were present, but did not prevent the attack from happening”

https://www.ohchr.org/Documents/Countries/UA/ReportUkraineFe...

June 2018:

“Since the beginning of 2018, members of radical groups such as C14, Right Sector, Traditsii i Poryadok (Traditions and Order), Karpatska Sich and others have carried out at least two dozen violent attacks, threats, or instances of intimidation in Kyiv, Vinnitsa, Uzhgorod, Lviv, Chernivtsi, Ivano-Frankivsk, and other Ukrainian cities. Law enforcement authorities have rarely opened investigations. In the cases in which they did, there is no indication that authorities took effective investigative measures to identify the attackers, even in cases in which the assailants publicly claimed responsibility on social media.”

https://www.hrw.org/news/2018/06/14/ukraine-investigate-puni...