The Darfur War in Sudan began in February 2003 when the Sudanese government, under the helm of then-leader Omar al-Bashir, began an ethnic cleansing campaign against non-Arabs people in the Darfur region.
The Sudan Liberation Movement and Army  and Justice and Equality Movement  formed as rebel groups to defend themselves from these attacks. In the years that followed, Sudanese government forces including the military, police and Janjaweed, or Rapid Support Forces, clashed with these two groups. The war has left 50,000 to 80,000  dead and an estimated 1.2 million to 2 million people displaced.
Janjaweed  worked with the Sudanese government through a liaison known as Ali Muhammad Ali Abd–Al-Rahman or “Ali Kushayb.” Wanted for years by the International Criminal Court (ICC) for multiple crimes against humanity, Kushayb remained in hiding in Darfur, under the radar — but now he has surrendered.
On February 23, an activist group in South Darfur claims the former Janjaweed leader fled Sudan, apparently in fear of arrest  by Sudan's transitional government, under its declaration  on February 11, 2020, to hand over all wanted persons by the ICC.
On June 8, several Sudanese activists discussed Kushayb's arrest by the United Nations forces in the Central Africa Republic. The next day, the ICC released a statement confirming his arrest:
Ali Muhammad Ali Abd–Al-Rahman, ‘Ali Kushayb’ is in the custody of the International Criminal Court (ICC) after surrendering himself voluntarily in the Central African Republic on account of an ICC arrest warrant issued on 27 April 2007.
Kushayb's photo circulated widely on Twitter:
Press Release : 9 June 2020 |
Situation in Darfur (Sudan): Ali Kushayb is in ICC custody
Today, 9 June 2020, Ali Muhammad Ali Abd–Al-Rahman (“Ali Kushayb”) is in the custody of the International Criminal Court (ICC) after surrendering himself voluntarily. pic.twitter.com/3SXeetUO5Q 
— Mohammed Musa_ محمد موسى (@Mohammedmusaj) June 9, 2020 
Kushayb is scheduled to appear in an ICC courtroom on June 15.
Colonel of Colonels
Ali Kushayb was known as Colonel of Colonels. He was commander of the Central Reserve Forces, one of Sudan's police departments.
He was a member of the Popular Defence Forces , as well as a commander of a government-backed militia in Darfur, from August 2003 until March 2004. In conjunction with his work as a liaison between the Sudanese government and Janjaweed, he fought in attacks against the armed rebel movements.
Authorities arrested  Kushayb in November 2006 in relation to rapes and murders that occurred in South and West Darfur. However, Ali was released and continued to move freely under police protection.
Wanted by the International Criminal Court
The ICC charged  Kushayb with 504 assassinations, 20 rapes, and the forced displacement of 41,000 people during 2003 and 2004. Unfortunately, those numbers are low according to the United Nations. By their estimation,  the death toll is about 300,000 people.
The ICC also demanded Sudan to hand him over but the Sudanese government at the time refused: They denied wrongdoing and insisted that any criminals arrested would be handled by Sudanese courts.
In August 2007, Amnesty International called for an end to impunity in Darfur, the arrest of Kushayb, and his surrender to the ICC. In May the following year, Human Rights Watch sent a letter  to members of the UN Security Council demanding justice in Darfur.
In October 2008, authorities arrested  Kushayb again to investigate the alleged crimes committed crimes in Darfur, likely to avoid handing him over to the ICC. The government eventually released him and he continued to move freely in Darfur. In July 2013, Kushayb was injured  in an assassination attempt in Darfur.
Good at hiding, Kushayb wandered through Darfur amid a media blackout. No one really knew who he was and he never appeared much in mainstream media —even after the fall of Bashir in April 2019.
Bashir was also wanted by the ICC — the first president in history to be issued an arrest warrant.
In response to Kushayb's voluntary handover, Secretary-General Khalid Omer of the Sudanese Congress Party tweeted:
قطع مسار ثورة شعبنا خطاوي مهمة اليوم، أولاهما باعتقال كوشيب كنصر للعدالة، وثانيهما قرارات لجنة التفكيك التي تواصل عملها لدك عرش الطغيان. الثورة تتعثر احياناً ولكنها بفضل شعبها لا تضل الطريق. ننتظر في مقبل الأيام تقدماً في ملف السلام ونعمل سوياً لاستكمال مهامها بالكامل دون استثناء
— Khalid Omer (@KhalidOmerYusif) June 9, 2020 
The course of our people's revolution made important steps today, the first of which is the arrest of [Ali] Kushayb as a victory for justice, and the second is the decisions of the dismantling committee that continues its work to demolish tyranny. The revolution sometimes stumbles, but thanks to its people, it does not get lost. In the coming days, we await progress in the peace file and work together to complete its tasks in full, without exception.
But views social media seemed to split into two camps.
On the one hand, groups agree that Kushayb's arrest will attract Bashir and all other wanted criminals from the Bashir regime to turn themselves into the ICC. Bashir currently stays at the central jail in Khartoum, where Bashir may face the death penalty. He has nothing to lose by moving from Khartoum to The Hague, where life in the Netherlands is arguably more comfortable and void of the death penalty.
All Africa posted a photo showing the room where he will stay while he on trial. The room is luxurious compared to the conditions of most homes in Darfur, which led analyst Cameron Hudson  to tweet this frustration:
Its beyond frustrating that even in detention Kushayb will live better than most Darfuris. https://t.co/LmfRzEgLUl 
— Cameron Hudson (@_hudsonc) June 10, 2020 
On the other hand, Kushayb's arrest could threaten the stability and continuity of the transitional period as there are some faces in the new regime who were suspected of participating in Darfur crimes — such as deputy president of the Transitional Sovereignty Council, Mohammed Hamdan Daglo, — popularly known as Hemedti. 
Hemedti is the leader of the Rapid Support Forces (RSF).  According to a Human Rights Watch report from September 2015, RSF operated as a group of “men with no mercy ‘ who killed indiscriminately and gang-raped women.
Recording these crimes at the ICC may create high pressure on Hemedti and his partners that could lead to thoughts about a military coup to protect themselves.
Meanwhile, several diplomatic voices including France  and the Netherlands applauded the development. Steve Blok, a Dutch foreign ِِaffairs minister, tweeted:
The arrest of Ali Kushayb is a major step in getting justice for victims of crimes committed in Darfur and the @IntlCrimCourt  investigation. Now that this suspect is in custody of the ICC the case can start. The Netherlands has always underlined the importance of accountability. https://t.co/BXKY9dDP1i 
— Stef Blok (@ministerBlok) June 9, 2020 
Some voices in Sudan are calling for community-based, government-led transitional justice processes to handle war criminals like Ali Kushayb, as opposed to regular justice processes through the courts, which could be time-consuming and costly.
In an interview with Radio Dabanga , Mohamed Abdelsalam, professor of international law at the University of Khartoum, describes the importance of transitional justice for Sudan:
It will make negotiations and a democratic transition in Sudan possible. Sudan needs institutional reform in the judiciary, the public prosecution, the army, the police and other institutions that provide public services.
If the criminal justice system, its institutions and its laws, will not be reformed, it will not be capable nor willing to prosecute the serious human rights violations and crimes that took place in the country. We need the establishment of institutions and courts that are in accordance with international standards.