Definition: Generate an appropriate title for the given text. The generated title must be short and include the main topic of the text. The preferred titles are under fifteen words.
Input: The allotment owner told the BBC that the suspect, Christian B, arrived there the year Madeleine went missing. German prosecutors said the two-day search near Hanover was related to the investigation into Christian B, a sex offender in prison in Germany. Police left the site, which once had a shack with a cellar, on Wednesday. Madeleine was three years old when she went missing while on holiday with her family in Portugal 13 years ago. The British girl disappeared from an apartment in Praia da Luz on the evening of 3 May 2007, while her parents were with friends at a nearby tapas bar. It sparked a huge police hunt across much of Europe. The man whose allotment neighbours the one being searched told the BBC that Christian B rented the plot for a few months in the year Madeleine went missing. The man said Christian B arrived in the spring or summer of 2007 and told him he wanted to insulate a small shack which stood on a concrete base in the garden with a small cellar underneath. The neighbour went on holiday in July 2007. When he returned in August, he said, the structure had been removed and he never saw the suspect again. Christian B was revealed as the main suspect in the case in June, as German and UK police made a fresh appeal for help. Suspects' surnames are not usually revealed in Germany for privacy reasons. The 43-year-old is believed to have been in the area where Madeleine was last seen while on holiday in the Algarve in Portugal. Police said he was regularly living in the Algarve between 1995 and 2007 and had jobs in the area, including in catering, but also committed burglaries in hotels and dealt drugs. German prosecutors have previously said they have evidence that leads them to believe Christian B killed Madeleine, but it is not strong enough to take him to court. Last month, the Metropolitan Police said the case remained a "missing persons" investigation in the UK because there was no "definitive evidence" as to whether Madeleine was alive or not. However, German investigators have said they are assuming Madeleine is dead. After the latest police appeal, Madeleine's parents, Kate and Gerry McCann, from Rothley, Leicestershire, said: "We will never give up hope of finding Madeleine alive, but whatever the outcome may be, we need to know as we need to find peace."

Madeleine McCann: Suspect Christian B rented allotment, neighbour says