Is it true this scientist refuses to surrender his work to the court ?

No. The data has been in the public domain since 1999 and it has been used in several other papers. The data are sound. In fact, they're available right HERE. You're welcome.



Is that because he had falsified the information ?

He hasn't. See above.


Does his chart dismiss established historic information.

Depends what you mean by historic information. There are many ways of obtaining climate and metrological data including historical records, ice cores, isotope analysis etc etc


Are the bulk of papers on the subject heavily leaning on this disputed and us surrendered graph?

If they were it wouldn't matter as the data and Mann et al's conclusions are sound, and these have been verified for not only the northern hemisphere but the whole planet. The hockey stick is real.


DMcG:

It is interesting that people think courts of law are the correct places to address such issues: this is a classic category error

That's not what the case is about, it's a defamation case essentially and the sort of tittle-tattle in the OP's link deliberately misrepresents this in an attempt to validate their own fringe view. It's nasty stuff, but typical of science deniers.