Nick Reiner's former yoga teacher, Alanna Zabel, while speaking to People in an exclusive article published on December 19, said that Reiner's issues were beyond diffusing. This comes after Reiner was charged with first-degree murder with a special circumstance alleging multiple murders. Reiner's charges are related to the deaths of his parents, Rob Reiner and Michele Reiner.Alanna, who held private yoga lessons with the Reiner family in the early 2000s, said that the couple's deaths were "shocking." Alanna recalled Nick's behavior at the time and mentioned that he "was notorious" for making sessions with Michele difficult."We never could get through one single yoga session without Nicky barging in and having an intense issue or meltdown and it would really break up the flow of a yoga class."Alanna mentioned that after years of working with Rob and Michele, the couple asked her to teach Nick Reiner privately. Zabel said the yoga classes helped Nick "calm down and channel his energy." Nick was also the inspiration behind Zabel's children's book, A Chair in the Air, where she talks about an overly energetic character named Nicky who learned to "regulate his emotions a little bit more."When talking about Nick's childhood issues, Alanna Zabel said,"One of those things where, as hard as they tried to manage it, get help, address it, it's just beyond any of us to be able to diffuse."More about Nick Reiner's involvement in parents Rob and Michele Reiner's deathsOn December 14, director and producer Rob Reiner and his wife, Michele Singer Reiner, were found dead at their Brentwood, Los Angeles home with multiple stab wounds.On December 15, Nick was arrested and held without bail. TMZ reported that Nick had checked into the Santa Monica hotel, The Pierside Santa Monica, around 4 a.m. on December 14. According to the outlet, Nick used his credit card to check in after getting into a heated argument with Rob at Conan O'Brien's Christmas Party.When hotel staff entered the room, they discovered blood on the bed and the shower was "full of blood." Staff also noted that Nick never checked out of the hotel. The LAPD released a statement on December 15, mentioning that Nick was behind his parents' deaths.Nick Reiner made his first court appearance on Wednesday in Los Angeles on two counts of first-degree murder. According to media outlets, Nick did not enter a plea; he was in shackles and wearing a jail suicide prevention smock.