SPRINGFIELD — Illinois’ top court has declined to weigh in on civil claims stemming from one of the state’s most notorious wrongful conviction cases.The Illinois Supreme Court denied a plea from Alan Beaman, who spent 13 years in prison for the 1993 murder of his ex-girlfriend, arguing police conduct in his case amounted to malicious prosecution.One of Beaman’s lawyers called the denial the “end of the line” for his client’s legal claims.“As I sit here right now, I don&rsquo …