Short story

A man escapes after committing a murder.   Who has he killed?   Why?  He still has the murder weapon (knife?) but is reluctant to part with it as he might need it (lost in wilderness?).

He is alone in a snowy wood - footprints filled in.

A short distance away a police officer discovers a murdered woman (isolated shop/post office?).   A trail of blood leads out to the road but then disappears due to the snow.