OnlyFans model Courtney Clenney was captured on surveillance video assaulting Christian Obumseli in the elevator of their luxury Miami apartment building just two months before she allegedly killed him with a kitchen knife, authorities said Thursday.

Miami-Dade State Attorney Kathie Fernandez Rundle played the video at a press conference when she announced a second-degree murder charge against 26-year-old Clenney.

"The defendant was aggressively attacking Christian," Rundle said of the Feb. 21 footage that shows Clenney in a white bra and pajama pants smashing elevator buttons before turning her rage on Obumseli. 

Rundle, describing the couple's two-year romance as "extremely tempestuous and combative," shared a detailed timeline leading up to the fatal attack on April 3 when Clenney allegedly plunged a kitchen knife 3 ½ inches into Obumseli's chest, puncturing his subclavian artery.

MIAMI ONLYFANS MODEL CHARGED WITH BOYFRIEND'S MURDER AFTER BLOODY FIGHT RULED SELF-DEFENSE

Courtney Clenney mugshot

The Hawaii Police Department assisted the U.S. Marshals Service in the arrest of OnlyFans model Courtney Clenney on Wednesday, Aug. 10, 2022. (Hawaii Police Department)

Rundle, flanked by Obumseli's brother and cousin, said that the pair's violent and toxic relationship "did not have to end in tragedy with Christian's murder as a victim of domestic violence."

Clenney, who goes by Courtney Tailor on social media, was arrested Wednesday in Hawaii and is awaiting extradition to Florida.

The murder rap against the influencer comes after the victim’s family expressed outrage she had not been charged. Clenney allegedly told police that she had acted in self-defense, and Obumseli was the aggressor – but Rundle said the evidence didn't support her claim.

Clenney said that she had thrown the knife from 10 feet away, but the medical examiner determined that tossing the weapon from that distance could not have caused the fatal stab wound, according to authorities.

Christian Obumseli and Courtney Clenney in an Instagram photo

Christian Tobechukwu Obumseli suffered "an apparent knife wound" in a domestic violence incident Sunday, according to Miami police. (Instagram/@christianvstoby)

Investigators said the stabbing occurred when Clenney was on the phone with her mother, Deborah Clenney, between 4:43 p.m. and 4:56 p.m. 

During the same time period, neighbors began calling building staff to report a disturbance, the arrest affidavit says. 

Clenney called 911 and Obumseli can be heard in the background saying that he is dying and losing feeling in his arm, Rundle said. 

"Defendant Clenney is also heard saying, ‘I’m sorry, baby,'" according to an arrest affidavit.

timeline of Christian Obumseli's slaying

A timeline of the moments before and after OnlyFans model Courtney Clenney fatally stabbed beau Christian Obumseli April 3, 2022, in Miami. (Miami-Dade State Attorney's Office)

When police arrived, they found Clenney cradling Obumseli in a puddle of coagulated blood.

At 5:25 p.m., her mother sent her a text mentioning "self-defense" and telling her "not to say anything to investigators without an attorney," according to police. 

It's unclear what sparked the argument, but the day had begun peacefully with the couple playing with their dogs, authorities said.

Miami-Dade State Attorney Katherine Fernandez Rundle at a press conference April 3, 2022, announcing a murder charge against influencer Courtney Clenney, 26, for the slaying of her boyfriend Christian Obumseli. Rundle stands next to the family's lawyer Larry Handfield and the victim's brother, Jeff Obumseli. (Alan Skuy / Fox News Digital)

Obumseli left the apartment for about three hours, returning at 4:33 p.m. with Subway sandwiches. At about the same time, Clenney had just wrapped up an Instagram live broadcast to her 2 million followers, bragging about her "great abs" and summer plans to build "my butt back up." It appears to be her last social media post.

The pair moved into the high-rise apartment in January, but fought so frequently that building staff had documented numerous domestic incidents and management was planning to evict them, the affidavit states.

Miami model Courtney Clenney takes a gym selfie

Miami model Courtney Clenney's lawyer said she is a domestic violence survivor. (Instagram/@courtneytailor)

Clenney had a pattern of attacking her beau. In July 2021, she was arrested in Las Vegas for domestic battery in their hotel after allegedly throwing a glass toward his head, according a police report obtained by Fox News Digital.

The pair had broken up in March but reconciled April 1, just two days before the fatal confrontation.

Hawaii County police assisted the U.S. Marshals Service with the arrest on the Big Island, where the influencer was in a rehabilitation facility for substance abuse and post-traumatic stress disorder, according to her attorney, Frank Prieto.

"I’m completely shocked, especially since we were cooperating with the investigation and offered to voluntarily surrender her if she were charged," Prieto told Fox News Digital.

"We look forward to clearing her name in court."

Diagram of the kitchen knife Courtney Clenney used to fatally stab Christian Obumseli. Prosecutors say she plunged the blade 3 1/2 inches into his chest. (Miami State Attorney's Office)

Officials said Clenney was expected to appear in Hilo district court at some point on Thursday in connection with the extradition.

Prieto has said that Clenney was forced to stab Obumseli after he grabbed her by the throat. The lawyer said Obumseli had been stalking her for weeks.

He blasted the prosecutors for releasing the elevator footage. "It's a shame that the State Attorney's Office is seeking to win this case in the court of public opinion by showing an irrelevant and likely inadmissible video of Courtney in an elevator getting physical with Obumseli," Prieto said in a statement. 

"Obumseli was the abuser, the worst kind of abuser. He would manipulate and abuse Courtney in private when he thought no one was around," the statement continued. 

FLORIDA MAN DEAD, MODEL LOVER FOUND SOAKED IN BLOOD

A lawyer for the victim's family, Larry Handfield, pressured the state attorney’s office to reopen the case after police concluded she had acted in self-defense. He stood with the victim's family at Thursday's press conference.

Video of Clenney handcuffed in a black bra and soaked in blood on the balcony of her Miami apartment after she allegedly stabbed Obumseli in the chest went viral. She was spotted at a hotel bar days after the slaying getting drinks.

Courtney Clenney in a selfie

A selfie of Courtney Clenney, accused of murdering her boyfriend, Christian Obumseli. (Instagram)

The slain man’s heartbroken brother, Jeff Obumseli, wrote on Instagram shortly after the alleged murder that Clenney was "being treated differently because of her privilege as a wealthy white woman."

He slammed the detective on the case for concluding within 24 hours of Obumseli’s killing that a crime had not occurred. 

"We have every reason to believe his death was the result of unwarranted and unprovoked violence," he wrote a week after his brother's death.

 Clenney was also not taken into custody despite an arrest warrant out of Austin, Texas, for failing to show up on a DUI case, records show.

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A spokesperson for the Miami-Dade Police Department declined to comment on the case.