* DPR was ready to pay friendlychemist upto $150K
* BUT DPR was also afraid it'd lead to more extortion
* DPR knew redandwhite was same as friendlychemist or an associate of his
Based on these assumptions, DPR's move to pay redandwhite was really DPR paying friendlychemist while also communicating the length to which he is willing to go to deal with extortionists. So by going the path he went, he paid off friendlychemist and scared him at the same time.
The guy he tried to have killed could show up and testify on his behalf and a reasonable jury might still find him guilty.
I think we can all see at this point that Ulbricht got played. But that doesn't exculpate him. (Not that it matters yet; he hasn't been charged with the attempted murder).
Toy version of the conversation.
FC: Give me money so I can pay my debts.
DP: Lemme talk to your creditor.
RW: I'm FC's creditor, whats up.
DP: I don't owe FC money. Rather I want him dead. Can you do this.
RW: Sure. $250k.
DP: I normally pay 80k to kill people. Split the difference?
... uh. wtf? The whole exchange really makes no sense, unless you assume that DPR knew he was talking to the same guy all along and was working on terms that would make the guy not bother him by scaring him off.
Edit: Nevermind! Apparently the 80k "hit" wasn't just a negotiation technique: http://www.baltimoresun.com/news/maryland/crime/blog/bal-sil...
Sounds like the guy was a petty criminal who wasn't as smart as he should have been if he wanted to run an underground market for criminal activity.
And anybody else who thought they would try and blackmail money out him. It seems completely plausible scenario and kills two birds with one stone. No pun intended.