The member of the state parole board who cast the tie-breaking vote that granted early release to former Weather Underground terrorist Judith Clark is married to a convicted murderer — a revelation that has outraged Clark’s victims and their families. Former Nyack Detective Arthur Keenan, who was shot and wounded during the infamous 1981 Brink’s robbery in Rockland County, was stunned to learn from The Post that parole-board member Tana Agostini had ruled on Clark’s case. “I’m very shocked that Agostini would be allowed to make a decision on someone who is a murderer,” Keenan said Sunday. “It’s a conflict of interest,”...