Complex sentence: The police report of the arrest alleged possession of an illegal switchblade, but the prosecutor has since described Gray's arrest as unlawful because the knife the arresting officers found in his possession was actually a spring-assisted pocket knife that is legal under Maryland state law.
Split into simpler sentences: The police report of the arrest alleged possession of an illegal switchblade. The prosecutor has alleged Gray's arrest was unlawful and described the knife the arresting officers found as a spring-assisted pocket knife that is legal under Maryland state law.