Eight-year-old Johanna does not return home from playing on September 2, 1999. The case will keep the police busy for 18 years.

From one day to the next, an elderly couple disappears without a trace.

10-year-old Mirco doesn't come home from playing at night. Sven Voss solved one of the most famous child murder cases in Germany in this episode of “XY”.

A 57-year-old department head was kidnapped in the early morning of January 17, 2003, right in front of her workplace. There is no trace of her.