The UN Mission revealed on Thursday that the Islamic State of Iraq and Syria (ISIS) militants overtly killed a female Iraqi human rights lawyer in the city of Mosul. Her death was due to their soi-disant Islamic Court reined that she had abandoned Islam.

On September 17, the Iraqi lawyer, Samira Salih al-Nuaimi was apprehended by the gunmen with the group's freshly declared police force from her home in a northeastern district of Mosul after purportedly posting messages on social media site, Facebook that existed precarious of the ISIS insurgents' destruction of religious sites in Mosul. The victim was with her husband and three children when the incident took place.

On a state of secrecy for fears of their safety, two people with reliable awareness of the incident told The Associated Press on Thursday that the killed Iraqi lawyer was brought to an undisclosed location. About five days later, the victim's family was informed by the morgue to claim her cadaver, which bore signs of torture.

As stated by the UN Assistance Mission in Iraq, Samira Salih al-Nuaimi was tried in a supposed "Sharia court" for apostasy, which she was subsequently tortured for five days before the militants penalized her to "public execution." The UN mission added that the Iraqi lawyer was killed by the ISIS fighters on Monday. Following her death, her Facebook page seemed to have been removed.

The death of the female Iraqi human rights lawyer and activist was apparently connected to her Facebook posts. The UN emissary to Iraq, Nicolay Mladenov stated in a statement that by brutalizing and killing Samira, who was defending the civil and human privileges of her fellow Mosul citizens, ISIL stays to show its notorious nature, combined abhorrence, nihilism and cruelty, as well as its total disrespect of human decency. The statement, however, did not reveal details on how she was murdered.

The ISIS militants seized the city of Mosul, Iraq's second largest city, through its hasty progress across the nation's north and west in June, as Iraqi security forces melted away. The terrorists now control a massive, self-declared caliphate bestriding the Syria-Iraq border in which they have enforced a punitive form of Islamic law and decapitated and slaughtered their adversaries. In the once-sundry Mosul City, the ISIS has mandated religious factions to convert to Islam, pay special taxes or die, instigating tens of thousands to abscond.

The ISIS group ruined a number of the town's historic landmarks, including some mosques and shrines in July and August, claiming they support apostasy and depart from ideologies of Islam. Among Muslim disciplinarians, apostasy is well-thought-out to be not just conversion from Islam to another faith, but also compelling actions that are contrary to the faith that one is considered to have abandoned Islam.

The Gulf Center for Human Rights said Wednesday that the killed Iraqi lawyer had worked on detainee rights and poverty. The Bahrain-based rights organization said her death "is solely motivated by her peaceful and legitimate human rights work, in particular defending the civil and human rights of her fellow citizens in Mosul."

The UN also revealed on Tuesday that in the neighboring town of Sderat, ISIS broke into the house of a female runner in the last provincial council elections, killed her and kidnapped her husband. On the same day, another female politician was seized from her home in eastern Mosul and remains missing.

ISIS extremists' blitzkrieg finally impelled the US to launch airstrikes last month, to help Kurdish forces and protect religious minorities in Iraq. This week, the US and five allied Arab nations expanded the Syria's aerial campaign, where the belligerent group is battling President Bashar Assad's forces other than Western-backed rebels.

Aside from the overt killing of the female human rights lawyer, the ISIS insurgents have recently killed Iraqi soldiers and apprehended 68 soldiers near Fallujah and then paraded their hostages through the city to display brute force.