A New England family in a small town was tormented by someone hiding, lurking and living in their walls for months in 1986. A year later they learned what this monster was capable of.

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Triple Murderer Daniel LaPlante Must Wait 15 More Years Before Chance At Parole - CBS Boston (cbsnews.com)

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The Elm Street Nightmare (celticssentinel.com)

Gustafson Murders - Newspapers.com™

Convicted triple-murderer Daniel LaPlante apologizes in bid for reduced sentence – Lowell Sun

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Daniel LaPlante's Murder of the Gustafson Family Revisited | Crime News (oxygen.com)

Man Convicted Of Killing Pregnant Mom, 2 Young Kids Appeals Sentence (youtube.com)

Daniel LaPlante, The Teen Killer Who Lived Inside A Family’s Walls (allthatsinteresting.com)

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COMMONWEALTH vs. DANIEL J. LAPLANTE :: :: Massachusetts Supreme Judicial Court Decisions :: Massachusetts Case Law :: Massachusetts Law :: US Law :: Justia

Gustafson Murders - Newspapers.com™

Daniel LaPlante: A Murderer Who Lived in the Walls of His Love Interest | The Mystery Box (medium.com)

Phrogging: Hider in my house, footsteps in the attic

Investigation Discovery The Real Murders On Elm Street Killer In The Walls