That “uncle” is a fraud and has been discredited, AFAIK.
Ok maybe so maybe not. The only ones I see disputing/speculating are the DU fellows. Even Snopes who I have my doubts about sometimes haven’t chimed in yet.Some reports have been apparently “disappeared” without a vociferous and prominent retraction/denial given the high profile nature of this incident
http://www.nyctn.com/a376622-exclusive-nancy-lanza-feared-son-adam-was-getting-worse-told-friend-he-was-burning-himself-with-a-lighter-and-that-she-was-losing-him