A huge conglomeration of public and private foundations put together a three-part series on the early 2000s murder spree of the National Socialist Underground called Mitten in Deutschland (In the Middle of Germany) in Germany and German History X when it was released by Netflix with English subtitles.
It's basically a trilogy of feature-length movies. I found it surprisingly good. German television and movies punch below their weight in general, but have shown some intermittent signs of improvement in recent years. Deutschland '83 is much more than watchable, and so is German History X.
The first movie, about the formation of the 2-man one-woman 'trio' which formed the core of the NSU, shows the protagonists coming together in the 1990s neo-Nazi scene in Jena. The three core performers are stellar. The film also does a fine job of demonstrating how young people in the damaged, demoralized East often sought fellowship and a sense of purpose in violent Nazi groups. The second movie focuses on the victims, and is held together by a strong performance by Almila Bagriacik, who emerges from adolescence under the shadow of the murder of her father. The police immediately seek the killer in the 'milieu' of foreign small businessmen, without considering the possibility of a terrorist motive even after numerous other foreign shopkeepers are killed with the same weapon used to kill the first victim.
The final movie, which focuses on the investigation, is the slackest of the bunch. This is hard to avoid, since the subject is, by definition, an investigation that went nowhere. The early-2000s murder spree of the three NSU members was discovered only posthumously, when two of them committed suicide after a botched 2011 bank robbery, and the murder weapon was found in their accomplice's apartment. The third movie paints a picture of detectives who develop solid leads, only to be frustrated by the machinations of the Thuringia state Verfassungsschutz. The Verfassungsschutz claimed to have deeply infiltrated the groups supporting the NSU trio, and fought against any arrests, questioning, or surveillance which could theoretically blow their agents' cover. Which meant, in the end, that they provided an enormous amount of cover, and even financing, to out-and-out Nazis who were committing sundry violent crimes. The movies' clear implication is that the Verfassungsschutz was operating at least in part out of sympathy for the right-wingers' goals.
The English translation of Verfassungsschutz in the movies was "secret service", which obviously doesn't do justice to this peculiar organization. English-language viewers certainly missed many of the implications of what was shown in the third film. Basically, the "Agency for the Protection of the Constitution", as the title means in English, is an originally West German domestic spying and intelligence agency. As its name implies, it is theoretically supposed to monitor, document, report on, and suppress any nascent threats to the German constitutional order. This includes right-wing and left-wing extremists, religious organizations, and cults. Each German state has one of these agencies, and there is a federal one as well. To call them controversial is an understatement -- they are often accused of putting far more energy into surveillance of left-wing militants than right-wing groups, and are also accused of chilling free speech by singling out politically-charged organizations and publications for scrutiny in their public reports. In fact, the right-wing weekly newspaper Junge Freiheit -- successfully sued to prohibit the Verfassungsschutz from mentioning them in its reports.
The agency has also been involved in innumerable scandals involving -- at the very minimum -- incompetence. The most recent in a very long list is the hiring of Roque M. (g) -- a German citizen of Spanish descent who was hired as a Verfassungsschutz spy in the State of Northern Rhine Westphalia despite a history of mental instability and bizarre behavior, such as acting in gay porn films even though he was a married father of 4, running his own gay porn publishing house, running a website selling "German Military Underwear. Strong. Manly. Sexy.", and converting to radical Islam. The Verfassungschutz -- apparently unaware of the possibility of running a Google search -- only found out about him when he bragged about being a mole in the agency and working on plans to destroy it in an online forum which was being monitored by his co-workers.
In fact, the picture of the German law enforcement authorities in all of the films is devastating. The Keystone Kops of East Germany let the three neo-Nazis go underground even after finding bombs and weapons in one of their hideouts. Cops invent a hare-brained drug-smuggling conspiracy theory to explain the totally unrelated murder of ethnic-minority shopkeepers all over Germany with the exact same weapon. (Although this isn't mentioned in the film, they also chased a phantom serial killer whose existence was based on botched DNA testing). Their attitude toward murder victims' surviving relatives is callous in the extreme; Germany still has only a vestigial state infrastructure for providing counseling and care to surviving family members of murder victims. And in the third movie, the police actively allow and sometimes even assist neo-Nazis to commit violent crimes and spread propaganda, either out of incompetence or covert sympathy for their goals.
The general portrayal of police agencies is counterbalanced by sympathetic portrayals of individual cops, but they are seen as constantly having to fight against institutional blindness, rivalry, and silo-mentality thinking. When they're not fighting against moles in their own and other agencies who actually intentionally assist the neo-Nazis. The picture of police is probably a bit exaggerated, but there is no doubt much of it was justified -- there are still dozens of very strange unanswered questions surrounding the fruitless investigation of the NSU murders. And, given the authorities' mania for secrecy and the lack of a culture of vigorous investigative journalism fed by leaks from inside the government, they'll probably remain unanswered forever.