Death is a lingering, looming thematic presence throughout all four "Dialogues." It is the trigger for the debate about justice that takes place in "Euthyphro," it is the unspoken fate sensed by Socrates throughout the "Apology", it is the fear-triggering motivation for Crito's urging Socrates to escape in "Crito" and it is the focus of the in-depth discussion (not to mention the emotional climax) of "Phaedo." It's possible to see, in fact, the debate in "Euthyphro" as defining and symbolizing the basic questions about death that permeate all four dialogues - is death justice?
The Trial and Death of Socrates: Four Dialogues