What should I look for at the scene of the death?

Hint 1 of 8:

Look at the calendar.

Hint 2 of 8:

Now, turn the calendar to the next day.

Hint 3 of 8:

That person mentioned on the calendar is his lawyer, and it's in reference to
the changes in the will.

Hint 4 of 8:

Get the calendar, and keep it for later.

Hint 5 of 8:

For another thing, look at the pad.