Who killed Melvin Tuttle?


Hint 1 of 8:
Tuttle gave his girlfriend some information on some seedy business deals.

Hint 2 of 8:
Both Swathmore and Livingston were searching through his locker at Bell's
Baths to find that information.

Hint 3 of 8:
If you talked to H. R. Murray, you should know that Tuttle was poisoned.

Hint 4 of 8:
And if you did any research at the library, you should know about the poison
that killed Tuttle.

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