Hello Teresa Maria,
somehow, info about Stotz is scarce.
Although he is among the Top 20 of Bf109 aces, the best Bf109 book I know
https://www.amazon.de/Die-ber%C3%BCh...words=musciano
doesn't feature a short biography of Stotz.
How come, you're interested in him ?
Are you one of the ultrarare female airwar enthusiasts ?
Cheers,
Michael