Complex sentence: Despite Tenma's attempts to reason with him Johan shoots Junkers; telling Tenma he could never kill the man who saved his life, he walks off into the night, with Tenma too shocked to stop him.
Split into simpler sentences: Despite Tenma's attempts to reason with him, Johan shoots Junkers. Telling Tenma he could never kill the man who saved his life, he walks off into the night, with Tenma too shocked to stop him.