Conversation so far:
When did Erich Mielke's trial take place?
In February 1992, Erich Mielke was put on trial for first degree murders and attempted murder.
What was the verdict of Erich Mielke's Bülowplatz trial?
After twenty months of one-and-a-half hour daily sessions, Erich Mielke was convicted on two counts of murder and one of attempted murder.
Who was the first person Erich Mielke murdered?
Erich Mielke was put on trial for the first degree murders of Captains Anlauf and Lenck.
Who was the victim of Erich Mielke's attempted murder?
Erich Mielke was put on trial as well for the attempted murder of Senior Sergeant Willig.
Did Erich Mielke know Captains Anlauf and Senior Sergeant Willig?

Question: How long did trial last?
Self-contained rewrite: How long did Erich Mielke's Bülowplatz trial last?