Board Thread:Off-Topic Discussion/@comment-6433273-20180322113157/@comment-24751918-20180414224638

Try to solve this:

In June 1st, it's Helen's birthday. During her bday party night at her place, no one comes except her best friend. When she goes to the restroom, best friend sneaky dumps a mysterious substance to her cake.

The next day, Helen suddenly died and when the police arrive, she holded 2 written paper says "432867" and "732688". Within a day, the killer is apprehended.

Who killed Helen and how did she died?

P.S.: Please try.