Germany's Federal Constitutional Court in Karlsruhe on Tuesday ruled that a person may not be deported to their country of origin if they are in danger of being tortured following arrival.

The court said that authorities needed "appropriate assurances" from the country of origin that "effectively excludes torture and inhumane treatment" of the person in question in order to follow through with a deportation.

Read more: Preventing terrorism: What powers do German security forces have?

From Berlin to Karlsruhe

The ruling stems from an appeal from a German-born Turkish national:

In 2015, a Berlin court sentenced a German-born Turkish Salafist to three and a half years in prison for supporting a Syrian terrorist organization.

Germany's immigration office in 2016 threatened the 30-year-old convict with deportation.

However, the Turkish man took the threat of deportation to court, saying that Turkish authorities have initiated a criminal case against him on terrorism charges.

The convict argued that he would be tortured – like other terror suspects – if he were deported, and backed his argument with a letter detailing such claims from Amnesty International.

Germany's biggest Islamist trials Failed Bonn bomb The blue bag left on the platform at Bonn's central station in 2012 contained explosives that did not go off, but a city-wide manhunt unfolded. Marco G. was eventually arrested and charged with planting the bomb. Three others are charged with plotting to assassinate a politician from the far-right PRO-NRW party. Their group allegedly drew inspration from an Islamist movement in Uzbekistan.

Germany's biggest Islamist trials Frankfurt airport bus attack In March 2011, Arid Uka shot dead two US servicemen waiting for a bus at Frankfurt airport prior to deployment in Afghanistan. "This is indeed the first Islamic-motivated terror strike to have happened in Germany," the judge said, adding Uka had sought revenge for military operations in Afghanistan. Uka, born in Kosovo, acted alone and was sentenced to life in prison in February 2012.

Germany's biggest Islamist trials The Sauerland Cell The "Sauerland Cell" was a German cell of the Islamic Jihad Union (IJU), a terrorist group on the Pakistani-Afghan border. The four German and Turkish men had planned large-scale bomb attacks against American targets in Germany from their base in the western region of the Sauerland. Arrested in September 2007, they were sentenced in March 2010 for up to 12 years.

Germany's biggest Islamist trials Sharia Police Sven Lau, a Salafist Muslim, was the man behind a well-known Islamist publicity stunt. In 2014, Lau led several men around the city of Wuppertal in orange security vests labeled "Sharia police." Acting as state authorities, they warned people visiting local clubs and bars to adhere to Sharia, or Islamic law. He is currently on trial for backing a terror group fighting in Syria.

Germany's biggest Islamist trials Big mouth Nils D., a Salafist from Dinslaken, joined the "Islamic State" in Syria in October 2013. He tracked down the group's deserters - armed with explosives and guns. He returned to Germany a year later, and boastful statements about his time in Syria eventually got him arrested. He confessed the names of other German Islamic extremists and was sentenced to four-and-a-half years in jail.

Germany's biggest Islamist trials "Biggest mistake of my life" On the final day of Harry S.'s July 2016 trial, he said "going to Syria was the biggest mistake of my life." The Bremen-born Muslim convert spent three months with "Islamic State" in Syria in 2015. He wanted out after civilians were murdered for a short recruitment film he helped make. He was sentenced to three years in jail for being part of a foreign terrorist organization.



Is Turkey likely to torture detainees: In the wake of a failed coup in 2016, Turkey launched a major crackdown, arresting journalists, teachers and judges. That year, Amnesty International said it gathered "credible evidence that detainees in Turkey are being subjected to beatings and torture, including rape."

Read more: What is the status of German deportations to Afghanistan?

What happens next: German authorities will have a tougher time carrying out deportations now. They will be expected to receive assurances from a person's country of origin that the returnee will not be subjected to torture by authorities after arrival.

ls/rt (dpa, ARD)