Definition: Given a document, generate a short title of the document. The title should convey the main idea/event/topic about which the document is being written. Note that URLs in the text have been replaced with [Link].
Input: Sergei W   28  told a court in Dortmund that he had not intended to kill anyone. He is a German of Russian origin. His full name was not revealed.
Prosecutors believe  Sergei W  gambled on the team's share price plunging.
 He  has been charged with 28 counts of attempted murder  which  he  denies. But  he  told the court: "I deeply regret my behaviour".  He  went on trial on 21 December.
 Sergei W  was arrested 10 days later in Rottenburg  southern Germany. Prosecutors say he had bought more than 26 000 put options on Borussia Dortmund shares  predicting that the share price would plunge after the attack.
It is reckoned that if the share price had fallen to one euro   Sergei W  could have made a profit of more than 500 000 euros (£443 270; $600 000)  German media report.

Borussia Dortmund bus bombing suspect 'did not intend to kill'