Complex sentence: Leon, unaware of Maya's involvement, finally decides to put an end to the butcher's crimes, and heads to the hidden subway entrance in the slaughterhouse, arming himself with several slaughterhouse knives, and wearing a butcher's apron.
Split into simpler sentences: Leon, unaware of Maya's involvement, finally decides to put an end to the butcher's crimes. Leon heads to the hidden subway entrance in the slaughterhouse, arming himself with several slaughterhouse knives, and wearing a butcher's apron.