I actually had to look up Kathy Shelton, but this is what you think he should have hung his hat on? http://www.snopes.com/hillary-clinton-freed-child-rapist-laughed-about-it/
Clinton joking about Taylor being guilty is on tape. Whether or not she can be heard laughing is pretty incidental. Reportedly also on tape is that while she didn't volunteer for the case, she took it as a favour to the prosecutor.
Not mentioned in the Snopes piece is that the psychologist who described the girl as a fantasist (and that young women are prone to exaggating early sexual experiences - a statement which isn't a great indicator of credibility) was appointed by Taylor (defendant) and Clinton, whom Shelton has said put her through hell. Also not mentioned: the evidence Clinton presented to get a renowned blood expert onside was incomplete, and his conclusion, that there was not enough blood to test (because most of the stained material had been cut away) was used by Clinton to show she had an expert on her side when she went for the plea bargain. Shelton's mother took it to protect her daughter from the tactics Clinton used, which would shortly thereafter be made illegal under Rape Shield laws.
At the very least, listen to the recordings and read the interviews with the victim at the Daily Beast and the Mail - linked right at the very bottom of the Snopes article. Those are the words of a woman who was the victim of, at the very least, sexual assault at age 12, who states that Clinton put her through extended hell.
Maybe Clinton was just following orders and had to take the case - contentious - and therefore did indeed have to defend him to the best of her ability. Whether she had to aggressively retraumstise the victim (as per the victim), mislead an expert into supporting her, and maybe have a chuckle about her client's guilt afterwards, I'll leave up to you. I personally choose to listen to the victim. One way or the other, if this were a Republican or a male politician, I think we all know Clinton supporters would be 100% supporting the victim rather than hunting for loopholes to erase her experiences.
(If there are typos and whatnot in this post, it's because I'm writing on my phone, which is being extremely erratic.)