He was off duty.
He had initially wanted to go home after a busy day at home, with fruitless results of solving what exactly was going on with the Knights family.
It didn't come as a surprise to him that Hazel's wedding was called off,it wasn't a surprise.Not when they had a lot going on in that family.
After giving out the autopsy results information to the head of the house,it didn't make any sense to him or to old man Williams that someone ate up some parts of the body of the dead guard.
It was not in his line of work not to leave anything uncovered, everyone was a suspect regardless of how innocent they all look.
But that's only Nathan,and Sophia Knights who weren't comfortable with the idea of having a talk with him.
That had given him more reason to buckle up in his research about what is going on in that family,and had kept a close eye on everyone.