Audit trail for deleted user

Level 1

Audit trail for deleted user

Hi, I have deleted a user and would like to see an audit trail of all his activity. I can't see him in the pull down list with DELETED next to him, he has just disappeared. Can anyone please advise how to access his audit trail? 

I only deleted him yesterday - yes I know I could have deactivated him but I didn't think of that at the time so do I need to give it 24 hours for him to show up as a deleted user?

Many thanks in advance