If there is one golden ticket out of a conviction for Hernandez, though, it's the hope that the jury demands a motive.
So the prosecution flails about, trying to show a rift between Hernandez and Lloyd. That includes putting Nicholas on the stand all because he claimed he briefly saw Hernandez glaring at Lloyd inside a nightclub in the early morning hours of June 15, 2013.
Hernandez, Nicholas claimed, "seemed upset" and was "angry about something."
What that "something" was, Nicholas had no idea. He claims Hernandez stormed out of the club, although video surveillance doesn't really suggest that.
A sort of general post regarding motive.
At the end of the trial, the jury will be instructed by the judge as to what they can/can't consider, the burden of proof, what "reasonable doubt" is, etc. The judge will also read the standard (or agreed upon) jury instructions for each particular offense to the jury, either before or after closing arguments. Either way, the attorneys should be able to use the actual language of the jury instructions to argue the evidence. Meaning they'll quote the definition of malice (for example) from the jury instruction, tell the jury they're going to get that instruction with that language, and explain how the evidence shows "malice." Many attorneys will use a projection or blow up of the instruction to check off points.
There's an upthread link to the general jury instructions for MA. Here's a link to the applicable instructions for murder (and other species of unlawful killings) http://www.mass.gov/courts/docs/sjc/docs/model-jury-instructions-homicide.pdf
Joint Venture is on page 14. Murder is further down. One won't find any mention of "motive" in the jury instructions. However, "intent" is required to be proven. The chestnut is that mere presence at a crime or mere knowledge that a crime occurred isn't enough to convict, and so people sometimes believe that "intent" is something that the prosecution needs to produce a smoking gun for - an email or a text saying "I'm going to kill that guy." In reality:
You are permitted, but not required, to infer the defendant's mental state or intent from his knowledge of the circumstances or any subsequent participation in the crime.29 The inferences you draw must be reasonable, and you may rely on your experience and common sense in determining the defendant's knowledge and intent.30
That's in relation to joint venture, but the idea is applied more broadly (consciousness of guilt/general inference instructions). In short, the prosecution does not have to show "why" AH killed OL, merely that the facts show (beyond a reasonable doubt) that AH participated in the killing of OL - and that the jury can infer AH's intent to kill OL from AH's actions in killing OL. It's sort of the snake eating its own tail, but it does work on an emotional level for many jurors.
So, although they're not the same thing, in some senses, "intent" is pretty much a proxy for "motive" - meaning, should any evidence show AH planned, did, or covered up the crime, the jury will feel more free to disregard the question of "why." It's sort of a form of burden shifting - in the sense that "lack of intent" becomes something that the defense must almost affirmatively raise. If the state's factual case is weak, there's no need to emphasize lack of intent. If the state's factual case is strong, "intent" can become something of an afterthought for the jury (in the absence of a self-defense theory).
(As an aside, one can have motive but no intent to commit a crime, or intent to commit a crime and no motive.)
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This also implicates the whole issue of AH's "character" discussed up thread - the more the defense moves towards "they were friends, so, lack of motive," the more dangerous it becomes for them.