It's certainly not my place to answer for "Joan," but one line of thought does suggest itself in answer to the question of why [she is] "so hardpressed to prove Paradiso didn't do it."
Almost the only investigatory acts with respect to Joan Webster's murder that have been made public were those instigated by Tim Burke when he was an ADA. He focused on one suspect, Lenny Paradiso. Whether there were any other suspects is a matter that for over a quarter-century has been concealed from the public. In Burke's zeal to nail Lenny, he sanctioned some extraordinary investigative excesses, spending hundreds of thousands of dollars of the Commonwealth's money on one venture he knew to be a blind alley and going to absurd lengths to link to Joan Webster items of Lenny's obtained via search warrant, all the while feeding his theory that Lenny was guilty to the Boston media.
Even people who had their doubts about the Iannuzzi case are unanimous in agreement that Lenny had nothing to do with Jioan
Webster, alive or dead. When remains that her parents have said were hers were discovered very far from saltwater and bearing injuries unlike those described by the witness whose credibility Burke has always vouched for, even law enforcement personnel stated for the record that they didn't think Lenny was guilty.
Yet Tim Burke continues to promote his implausible theory of Lenny's guilt and has committed these views to paper in a book, which he vigorously promotes.
So suppose you want to find out who killed Joan Webster. Her parents are standing pat on the Burke theory and are not about to call for a reinvestigation. Casting doubt on Burke in this matter won't get you very far, however, because Lenny (a) was never indicted for the crime and (b) is no longer with us. Thus no matter how far off the wall Burke's approach was, he can't be fired from the DA's office because he no longer works there, and his cockamamie tale wasn't laughed out of court because it never got that far. It is noted for completeness that no grand jury ever bought it, and Burke went that route repeatedly.
Yet there is a connection between the unorthodox investigation of Joan Webster's disappearance in which Burke was very active and another case in which sketchy investigative techniques and flat-out prosecutorial misconduct are matters of public record. That case, of course, is Commonwealth v. Paradiso, which ended in Lenny's unjust conviction for the murder of Marie Iannuzzi.
Does it not make sense to you, Great One, that when direct attempts to get to the bottom of Joan's disappearance and presumed murder meet stone walls, other avenues will be explored?
skydove