I still am confused as to what is hearsay and what isn't. For example, couldn't the D.A. ask the sister if she received a text from her dead brother and then provide a printout of the texts that were sent? That's documented.
The texts would be hearsay because they were sent from outside the courtroom, were not sent under oath, etc.
The D.A. could ask the sister if she received any texts -- but as soon as he asks what the texts said, or seeks to introduce the content of the texts into evidence, then you'll get a hearsay objection.
Put another way. "I read an article in People magazine that said BLAH BLAH BLAH." Then the prosecution produces a copy of the article. That wouldn't be hearsay . . . they have the article.
The "BLAH BLAH BLAH" part would be hearsay.
Let's say that the article in People magazine said that Bruce Jenner was in a car accident. The magazine article could not be admitted into evidence in order to prove that Bruce Jenner was in a car accident, because that would be hearsay. The author of the article was not under oath, etc. If there's some
other reason to introduce the article into evidence, such as that some particular reader
thought that Bruce Jenner was in a car accident (because she'd read the article), it could be introduced for that reason if the reader's subjective beliefs were relevant to the case.
In the Hernandez situation, the text said that Lloyd was with Hernandez. The texts cannot be introduced to show that Lloyd was with Hernandez, because that would be hearsay. They can be introduced to show that Lloyd's phone was still functioning at the time -- but for that, we don't need the content of the texts, but just the fact that they were sent and received. Which is what the court is allowing.