Legal nerd butting in here...
I've been following the hearsay/text discussion and been trying to figure out how they get Lloyd's texts in. Seemed like none of the hearsay exceptions in Mass. really would work. Now, it's been nearly a decade since I took the bar, I've never seen the inside of a real courtroom, and my practice doesn't involve the rules of evidence in any way, so I'm not exactly an evidence expert. But if I'm remembering things correctly, I think they should be able to get the texts in by using them to prove facts other than what the statements in the texts say directly (that is, to prove something other than that Lloyd was with "NFL"). Someone alluded to it above, talking about someone calling about a fire.
I've been thinking about it for days trying to come up with else they could use the texts for, and I'm amazed that not only did it take me this long, but that no else has mentioned it. I kept focusing on the effect on his sister, or whatever, but it's much simpler - time of death. The texts are critical in narrowing down the window for time of death. Because, obviously, dead men don't text. The "NFL" text proves he was alive at the time he sent it, and time of death is obviously important in any murder case, but especially in one like this where the prosecutors have to construct a timeline using circumstantial evidence, and it's important that his death happened when they say it did.
Now, there's a caveat that you still have to authenticate it and prove that it was really him who sent it. If you watch enough Dateline, you know murderers have been known to send texts from their victims' phones after they're dead, in order to trick people into thinking that they're still alive. So the "NFL" text to the sister could be used to prove it was really him, because presumably she can testify that she knew it was code only he would have used. The only other plausible explanation would be that some other unknown person killed Lloyd, then used his phone to send the sister a text in order to frame AH (and knew that Lloyd would call him "NFL"). Which seems...unlikely. (The only other explanation would be if AH, Ortiz, or Wallace sent it. I know we all agree that AH is a moron, but come on, it's one thing to be dumb, but I still don't think he's going to actively implicate himself.)
Anyway, some other legal nerds can chime in here, but I don't see hearsay being a problem - it shouldn't even be relevant, because it seems to me they should use them to help establish time of death (or at least to narrow the window for it). I assume the prosecutor wouldn't be allowed to say that the texts prove he was with "NFL" minutes before he was killed (because that still is hearsay), but that doesn't prevent the jury from concluding it on their own.