"Went to Beard's house to get the letter that her brother had written! They were begging Whitmore for money.

Don't you see the game?
Whitmore turned them down.
So what was there to do except to kill him and get his estate ?" To the impressionable mind of Greig the evidence against Mrs.Collins was conclusive.

The grave, complex problem that had baffled his superiors had suddenly simplified itself.

A woman needed money; she could obtain it through another's death.

What more reasonable than that she should go forth and slay him?
Britz's more penetrating mind, however, did not find the solution so easily.