Who killed Jacob?

Easy, 4 clues

4 people were in the building, and one of them did not come out. Everyone was on a different square, one to a row and one to a column, on the 4 by 4 plan. Work out where each of them was, the victim included. Whoever was alone with the victim did it.

Stand or sit onspiral stairs

Only besidelighthouse lamptelescope

Tap a square or drag Martha. Hold for a note.

MarthaShe was in a corner of the dunes.

The cards

Pick a person by tapping the photo on their card, the victim too. Then tap a square to put them there, or drag the photo onto it. Their row and column are crossed off for you. Holding a square, or switching the pencil on, makes a note. Keyboard: Enter places, Shift and Enter makes a note.

MarthaSelected
She was in a corner of the dunes.
Sami
He was in the tower, beside the stairs.
Wilf
He was beside the lighthouse lamp.
Jacob
The victim. He was on the one square nobody else can have, in the same room as the murderer.

Good to know

Beside: on one of the four squares directly above, below, left or right, in the same room. Diagonally does not count, and neither does through a wall. A window or door in the wall of your square is beside you.
In a corner: on a square of that room where two of its walls meet. The end of a narrow corridor counts too.

0 of 4 placed

Place everyone first, the victim too.