Bobbi Kristina Brown’s ex-boyfriend Nick Gordon’s cause of death has been officially ruled as an accidental heroin overdose.

Gordon’s brother, Jack Walker Jr., previously confirmed to PEOPLE that Gordon died in Florida on Jan. 1 after a drug overdose.

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Joe S. Habachy, Gordon’s lawyer, previously opened up to PEOPLE about his client’s death. “My heart is heavy today after learning that my longtime client Nick Gordon died at the young age of 30,” he said.

“While I cannot speak to the specific circumstances of his death, I can say that it’s been truly heartbreaking to have witnessed first hand the total devastation that drug addiction has wreaked upon a group of young friends, all of whom were loved and had immense potential,” Habachy added.

The Daily Mailpreviously reported that Gordon had suffered multiple heart attacks on New Year’s Day and was rushed to the intensive care unit at Altamonte Springs Hospital where he eventually died.

After learning the devastating news of Gordon’s death, Walker Jr. expressed his sorrow in aposthe shared on Facebook.

Source: Nick Gordon/Twitter

Source: Nick Gordon/Twitter

“GOD WHY I DID I HAVE TO LOSE MY BROTHER ON NEW YEARS” and “All I can do is cry,” he wrote.

In anadditional posthe added, “I love you so much big brother I hope you heard me talking to you at your bedside you are with me and I can feel it I love you I love you I love you watch over me and your nieces.”

“S— wasn’t suppose to go like this … you were [my] best friend and I never in a million years thought I’d be writing this for my ACE I was there through every step we all love you no matter what and we’ll all stay strong for you,” Walker Jr. wrote. “New Years didn’t have to start like this and you just told me you HAD to see me for New Years but I’m blessed I got to talk to you last night you will forever be my best friend nobody will ever take your place.”

Bobbi Kristina Brown and Nick Gordon.Imeh Akpanudosen/WireImage

Bobbi Kristina Brown, Nick Gordon

Gordon’s sudden death came three years after he was found liable in the wrongful death case ofWhitney Houston‘s daughter.

Brown wasfound unconscious and unresponsivewith drugs in her system in the bathtub of the Georgia townhouse she shared with Gordon in early 2015. She was 22.

Throughout his relationship with girlfriend Laura Leal — his final high-profile romance after the death of Brown — Gordon was involved inlegal troubleregarding physical altercations between the two.

source: people.com