This allegation was made a few years ago by TW and was debated on here, and I am led to believe all came to nothing.
Most successful salvors manage to upset a few here and there, and I am sure many claims are just made for malicious purposes, so any allegations should not be repeated until anything is proved.
Like them or not, no one can take away the achievements and hard work of the great treasure Salvors such as Marx, Fisher, Stenuit, Hatcher, Stemm etc, etc,
When any of us can come close to the effort these guys have put in, recovered a fraction of what they have recovered, published a fraction of what they have published, or took the physical or financial risks that they have took, and then say you have done all this without crossing a line, upsetting an investor, partner or team member, or never had a run in with a legislator, you can then start to think about criticising them.