Young Johann was forced to steal to survive and at the age of 9 he entered prison for the first time (for 2 weeks).
Grasel became leader of several groups of brutal robbers in south Moravia and northern Lower Austria.
[1] Unlike many others of his kind Grasel entered folk legends, both as a noble hero who took from the rich to give to the poor and as a brutal rascal.
The second interpretation made it into Czech and the word grázl (meaning "villain") is now commonly used, even without knowledge of its origin.
[1] In the Czechoslovak TV series Slavné historky zbojnické (Famous bandit stories, 1985), Grasel is portrayed by Czech actor Ivan Vyskočil.