Here is the official statement by the RIAA:
"Our hearts go out to the Scantleberry family for their loss. We had decided to temporarily suspend the productive settlement discussions we were having with the family. Mr. Scantleberry had admitted that the infringer was his stepson, and we were in the process settling with him shortly before his passing. Out of an abundance of sensitivity, we have elected to drop this particular case."
Well, the wording of the case says they have dropped "this particular lawsuit." Which implies to me they'll come back with a NEW lawsuit against the stepson.
And notice the only reason they dropped the lawsuit was because of "an overabundance of sensitivity" which basically means they realized this case made them look like a bunch of inconsiderate jerks. If this hadn't gotten so much exposure, they probably wouldn't have dropped it.