Between 2000 and 2001, Baum and two other lawyers together represented about three-quarters of the
Air France Flight 4590 crash victims' families. In May 2001, they reached a monetary settlement for compensation from
Air France. According to people familiar with terms of the settlement, it was between $100 million and $125 million (€114.1 million and €142.6 million), an extraordinarily high sum for a plane-crash settlement in Europe at the time. From 2001 to 2003, Baum served as
UN Special Rapporteur on the
Situation of Human Rights in Sudan. In 2006, Baum presented a press freedom award to
Berliner Zeitung for its resistance to an unpopular takeover by
David Montgomery’s
Mecom Group. In 2009, Germany's national railway company
Deutsche Bahn commissioned Baum and former justice minister
Herta Däubler-Gmelin with investigating allegations according to which the company had, in violation of privacy laws and corporate guidelines repeatedly and on a large scale compared personal data of its employees with those of suppliers, in a bid to uncover possible corruption. In 2016, Baum joined members of the Green Party, lawyers, a journalist and a doctor in bringing suits against Germany's 2009 antiterrorism law before the
Federal Constitutional Court, arguing that covert surveillance, particularly in private homes and in the intimacy of bedrooms or bathrooms, could entangle innocent third parties. In a 6-to-2 vote, the court ruled that the antiterrorism laws were partly unconstitutional and demanded tighter control over surveillance. In 2022, shortly before the 50th anniversary of the
1972 Munich massacre, Dutch lawyers Carry and Alexander Knoops asked Baum to intervene in the negotiations between the victims’ families and the
government of
Chancellor Olaf Scholz, which eventually resulted in a compensation offer totalling €28 million ($28 million). Baum died in Cologne on 15 February 2025, at the age of 92. ==Other activities==