With the 53rd anniversary of late Megadeth drummer Nick Menza’s birthday, his family, management and biographer are promising some shattering public disclosures about Nick’s final months - and the disgraceful treatment they’ve received since the musician’s sudden death.

Late in the evening on May 21st, 2016, Nick collapsed after suffering a heart attack during a concert with Chris Poland and Robertino "Pag" Pagliari in their band OHM at The Baked Potato in Studio City, California and was pronounced dead upon arrival at the hospital. The Los Angeles County Department of Medical Examiner-Coroner said Menza died of hypertensive and atherosclerotic cardiovascular disease.

Little more than a year later, the Menza camp has its crosshairs on Megadeth founder Dave Mustaine, according to author J. Marshall Craig, manager Robert Bolger and Rose Menza, Nick’s mother, who is now guarding and caring for the drummer’s estate and legacy.

Shortly after Nick's passing, Rose expressed her "enormous gratitude for the outpouring of love and condolences from Nick's many friends and fans," adding that she was "so happy and excited" that Megadeth leader "Dave Mustaine has chosen to help celebrate Nick's life and help the boys (Nick’s two surviving sons)" with a benefit memorial concert that was proposed to feature all willing former members of Megadeth.

In the days after Nick’s death, Mustaine told media that, "The Nick that I know, at the end, I think that he… he went to heaven doing what he wanted to do: play drums. And I think that instead of us all mourning, we should celebrate his life, celebrate his legacy."

Mustaine insisted in interviews that he had a "very, very close" relationship with the drummer, despite Menza’s public accusation that the Megadeth frontman sent him a "ridiculous proposal" for a failed 2015 reunion of the band's classic Rust In Peace-era lineup. In interviews and public posts on his social media, Nick revealed that Mustaine refused to pay for rehearsals or even recording the next record, offered an insulting weekly touring rate. When Nick’s attorney and management submitted a counter-proposal, Mustaine lost his temper and scuttled the reunion, changing his phone number and email address. Nick and Mustaine never spoke again, which Craig says is explored fully in MegaLife: Nick Menza - The Book.

“Dave’s betrayal was really a huge blow to Nick,” Craig says, “But I can say that not long after, Nick was as sure as ever that he was better off and far more musically satisfied playing with Chris and Pag. He absolutely loved those guys. He was far more excited about the prospect of playing Europe with Ohm than he ever seemed to me when the subject of Megadeth came up. He told me he wanted the reunion for what it could have and should have been - a celebration of a band at its zenith, regrouping one more time for the fans.

“Yeah, it would have been great. And who’s to say it still can’t be sometime in the future,” Nick said in his final interview with Craig, at Rose Lane Studio in Carpinteria less than a month before his death. “It sure doesn’t look good now but I’ll never say never; it’s all up to Dave. It always has been.”

In the year since Menza’s death, sadly, Mustaine has failed to not only stage a memorial concert featuring surviving Megadeth alumni and for the benefit of Nick’s sons - he has yet to call Menza’s parents or even send a condolence letter.

“He never called,” Rose said this week from the family home in Studio City. “I am really upset at him (Mustaine). They were NOT good friends, no matter what he says now that Nick’s not here to answer what’s being said about him.”

Mustaine now tells the media, "People think that we had this failed reunion attempt. There were several times that we tried to reconcile stuff, and it just didn't happen for whatever reason - I don't know why, but it didn't."

Says biographer Craig, “Dave knows exactly why there was no reunion, since he pulled the plug - again - as can be clearly seen in mail exchanges between him and Nick, which Nick gave me complete access to. I’ve put the conversations in the book, unabridged. Dave’s at once friendly and encouraging and then, in an instant, childish and rude; Nick comes across like, well Nick: Polite, agreeable and accommodating, trying his best to get along and make it work. I’ve been telling media before and after Nick’s passing that he never sought to call out Dave for the things he did and said, which is completely true. Nick wanted to take the high road and, indeed, he always did, and we’re honoring that legacy. Believe me - there is A LOT that Nick revealed to me that is not in the book… though what is most fans will find pretty shocking, but not a surprise. I am told that Mustaine has again been months late in paying Nick’s estate royalties due, which has been a constant source of tension through all of the years I’ve known the Menza family. In consultation with Nick’s Mom and Dad and sister and ex, his manager Rob and Nick’s closest friends, we’re unanimous in the decision to not censor anything now.”

Craig, best known for his deeply behind-the-scenes books with Animals frontman Eric Burdon and Rolling Stones keyboardist and musical director Chuck Leavell, believes the most disgraceful incident so far is the Megadeth frontman’s treatment of Menza’s surviving young boys.

As for repeated declarations from Mustaine that he “sang almost every single note of Marty Friedman's guitar solos, and I wrote the majority of Nick's drum parts, and I wrote almost every bass note that Ellefson played" and “I did it to [former guitarists] Jeff [Young], Chris [Poland] and Al [Pitrelli], too,” Craig, says that long before Nick’s death, he held nothing back on discussing his time in Megadeth and how the band’s management treated him in years since. “I’ve been privy to it all,” Craig says, “the emails, the attorneys’ and managers’ correspondence on both sides. I think it paints an ugly picture, but fans will be able to make that assessment for themselves when they see the book.”

“Nick didn’t want a tell-all, and nothing about this book can be considered salacious in the least,” Craig concludes. “But that doesn’t mean it’s not going to be controversial and perhaps bruise a few feelings that deserve to have the wind knocked out of them: This book is the truth - Nick Menza’s true MegaLife.”

Drum clinic video shot by J. Marshall Craig in 2013 at Nick's Disintegrator Studios in Studio City, California during the research / writing of the late drummers memoir, MegaLife: Nick Menza - The Book by J. Marshall Craig can be seen below: