Nope. He bought an illegal gun to kill his father. He stayed at Smich's place as an alibi, leaving his phone and credit card to give the appearance that he was there all night. He said he was going on a date and coming back to Smich's (which he'd never done before), so why would he go to his dads place in the middle of the night. None of the facts match your scenario.
I am just catching up from yesterday, so sorry if my comments have already been massively hashed out here.. really really disappointed in MM's testimony of what I have read so far,.. seems she has told too many lies and too many inconsistencies and memory failures to count on her. As mentioned in the post above, the pre-planning on DM's part is just incredible, imho. This really soaks him for murder one, as opposed to murder two. The thinking ahead to leaving one phone which could be traced as an alibi to say he was at MS's all night long.... the cc left to purchase pizza with, so that he could have the alibi of having bought pizza while there.. wow.. there was no way this was just a sudden act of having to get rid of JC before it was too late.. this was definitely preplanned strategically, for what sounds like a long time... also considering the particular gun he purchased for this murder - being an old fashioned gun, it would have fit right in with DM's narrative about WM having had guns in the past.
I'm so dumbfounded that police never bothered to check ANYTHING about the gun - registration/ID/imprint/serial number/whatever? DNA? It's not like this happened in the 80s. Why would they not have checked out the gun at the very LEAST, which would presumably have led to further investigation into things from there.
Do taxi companies keep records on where their fares get picked up and delivered to, times and dates, etc, and if so, for how long? Also considering his thinking ahead to use a taxi-cab that night...
Have you guys figured out what was up with Pedo that night yet?? If DM had brought Pedo with him over to MS's house, and left Pedo in Smich's care during his murder excursion, then returned to MS's house afterward... then left the next day... presumably to go to the hangar where he also had plenty of mechanics as witness to his whereabouts, - did he have Pedo with him at the hangar? How long was he there? Did Pedo stay in his vehicle while he was in the hangar (being end of November, assuming the dog could have withstood staying in his vehicle for a couple hours without ill effect??).. then finally having to go to Maplegate to discover the body himself, since nobody else had done so.. and saying that Pedo was there waiting for him.. what would be the whole purpose in that scenario?? But......... this in fact has screwed him... because.... if in fact, as DM said to police, Pedo was there 'waiting for him',.. why on earth would Pedo be at Maplegate when DM had NOT been at Maplegate for days?? He said last time he'd seen his dad was day before at a meeting at the hangar, correct? So....... he just leaves Pedo for days on end at his dad's place for his decrepit dad to take care of?? That is handy! (Not!)
edited to fix typos