Below you can find the In 1929 al capone's men massacred rival gangsters on st. valentine's day in this city Jeopardy Words Answer. The answer to In 1929 al capone's men massacred rival gangsters on st. valentine's day in this city has 7 letters. This clue belongs to the It happened on valentine's day category and is part of Jeopardy Word Level 2145. If you scroll near the bottom you will find other clues and answers part of level 2145