While James was busy being interrogated by the ministry another departed soul was returning from the dead.
Lily Potter.
She awakened in the graveyard in Godric's Hollow right on her grave. she was very confused as it wasn't everyday one returned form the dead on their own grave. She also read James' name on there and started worrying if he was alive as well but she noticed Harry's name wasn't on their so she decided to take a walk around town.
First place she decided to go would be their old home. She was shocked to see how ruined it was and upon approaching she noticed the sign that popped up and she felt happy that Harry lived and all these people came to pay their respects. After a quick walk around the town she decided to go see if she could scare Petunia and her fat boat of a husband.
For old time's sake.