I have no idea what TD's defense will be for MS, but I think he'll likely try to assert that MS was under threat of death, IMO. Since MS was there, IMO, and saw or even participated in TB's incineration, I think TD might argue that MS was terrified of DM and feared that DM would dispose of him in the same manner if he didn't cooperate and if he ever told the truth about it, IMO.
I'm just speculating as to what possible defense that could help MS and that's the only thing I can come up with. Of course, MS is also charged in the death of LB and since LE say she too was incinerated, it's hard to explain how or why MS would continue any association with DM after that horror that preceded TB's murder, but LB won't be brought up in this trial anyway. So, IMO, TD will either try to assert that MS was not on the TB test drive (unlikely) - OR - (lol) TD will say he was involved but only under duress. IF MS had a drug habit and DM was supplying him with drugs, TD could also argue that type of dependence on DM and a reason MS didn't go to LE with what he knew at the time of TB's murder. If TD were to say any or all of those things in defending MS, it would be somewhat more understandable a defense, IMO, than what we heard from SS today who - unless SS actually knows far more about the murder(s) - had little to no good reason to fear DM and therefore has no excuse for why he did not call LE, IMO.
But truly, I'm just waiting to see what TD has to say in his client's defense. It's only speculation on my part, as more likely, as per the Crown, there is damning evidence to convict MS and I believe it will be coming sooner rather than later, IMO. Until then, I wait....
All MOO.