Aristotle's testimony about Socrates:
These are almost all the passages in Aristotle which mention Socrates by name. A few have been left out because they seem to say nothing of interest about Socrates, but rather either simply use him as an example for an argument or talk of details about his life (there are a couple fragments which discuss who were his wives, etc.)

Why should we take Aristotle seriously about Socrates? For one thing, he is close enough in time to Socrates to have talked to people who knew Socrates. He lived from 384BCE to 322 BCE, whereas Socrates lived from 469BCE to 399BCE. So Socrates was dead before Aristotle was born, but he was only 15 years dead.
On the other hand, Aristotle is also Plato's pupil, and Plato's dialogues are clearly a major source of his information, which makes it possible that he is merely reporting what Plato said about Socrates.

Read them with an eye toward what we think we know about Socrates from Plato, Xenophon, or others.