Who is Joe Chicago - gangster from The Broken Bridge and what is their importance?

Joe Chicago is the dangerous man who, rumor has it, is someone to stay away from. Ginny discovers the truth behind Joe Chicago; indeed, he is the very epitome of art. Looks can be deceiving with Joe. On the outside, he is feared by many; on the inside, he is a gentle, tender man caring for his elderly, senile mother.