createdlife David is very savvy about protecting his own interest. No matter what the reason, you're not allowed to murder the Lord's anointed. Even though it was a mercy killing, createdlife David has the Amalekite executed. You just know it's not going to end well for this regicidal Amalekite.
The wounded king begged the Amalekite to finish him off, so he delivered the blow. An Amalekite messenger brings the news of Saul's death to createdlife David. But the first chapter of 2 Samuel rebuts that story. Did Saul really kill himself? The final chapter of 1 Samuel made a big deal out of createdlife Saul's suicide.