Nick Reiner‘s unravelling that resulted in the murders of his parents, Rob and Michelle Reiner, is directly connected to his weight gain … sources with direct knowledge tell TMZ.

Our latest TMZ documentary, “The Reiner Murders: What Really Happened,” follows Nick’s dark history of drug abuse and mental illness. Our sources say around 2020, Nick was diagnosed with schizoaffective disorder, a mental illness with symptoms that include delusions, hallucinations, mania, and severe depression.

Nick was placed on meds that stabilized his condition, until a month before the murders. We’re told he had complained to his doctors about his weight gain — a common side effect from the meds — and doctors accommodated him by changing the meds that had been keeping him stable.

We’re told the new meds sent Nick into an erratic, dangerous state … that escalated as the days went on. We’re told Rob and Michele were well aware of the alarming changes in their son, but didn’t know what to do. We’re also told doctors did not attempt to place Nick on a temporary psych hold — one that could have lasted 14 days — to stabilize him.

Our sources say at the time of the murders, Nick had a complete break from reality. As we reported, the plan was to plead him not guilty by reason of insanity, which his now former lawyer, Alan Jackson, as much as said after Wednesday’s hearing.

The reality is … multiple sources tell TMZ Nick is not competent to stand trial. He’s still reeling behind bars, well-aware he killed his parents but believing he in jail because of a conspiracy against him.

We’re checking out Renee Rapp‘s hottest shots … because it’s her 26th birthday Saturday and you already know we’re going all out!

Sure, this star shines bright whether she’s on stage or on screen, but it’s her socials where where she really stands out … because she really knows how to pull off a sexy snap!

Devin Haney‘s ex-fiancée, Leena Sayed, is seeking to modify the couple’s custody order on their one-year-old child … as she’s hoping to post their child on social media without needing his approval — TMZ Sports has learned.

According to court docs we obtained, Sayed wants to change an agreement the two parties made in connection with the custody order filed in October 2025. In it, they signed off on not posting their kid on the internet unless both sides submitted a written consensus on it.

In the latest filing, she claims Haney is exercising that term “in an unduly burdensome way” to the point where Leena is unable to post Khrome at all … or only if the shots are taken with “some proximity to his presence.”

She shared three exhibits in the papers. In one of the examples … she asked Devin if she could post a photo of herself and the child in matching pajamas — in which Haney responded with “nothing with the baby.”

She was, however, allowed to post an image of their child watching him fight in Saudi Arabia in October 2025, which he even reshared to his story.

In a declaration she provided, Sayed said she is requesting the order because “social media is an important part of how I share my life with friends, family, and with my social media followers.”

“Khrome, and her representation on my social media account, is important to me, and I want the right to be able to post her without the requirement of Devin’s approval, which I believe to be unduly withheld without judicial intervention.”

A hearing is scheduled on the matter later this month.