It was simply too much for Celeste Flores-Narvaez to handle -- seeing up close the man accused of the gruesome murder of her beloved younger sister, Debbie.

In an exclusive interview with RadarOnline.com, Celeste told us what was going through her mind -- and through her heart -- when she shouted at Jason "Blu" Griffith during his arraignment in a Las Vegas courtroom Wednesday morning.

EXCLUSIVE PHOTOS: Debbie Flores-Narvaez

"When I walked into the courtroom and looked at Jason, I burst into tears. I couldn't hold back the pain I felt and yelled, 'I hope you rot in hell for what you did to my sister you bastard.'  An officer came over and gave me some tissue, it was too too much to handle", Celeste told us.

Jason "Blu" Griffith -- the one-time boyfriend of murdered Vegas showgirl Debbie Flores-Narvaez -- made a brief appearance in a Las Vegas courtroom Wednesday morning for his arraignment.

EXCLUSIVE PHOTOS: Debbie Flores-Narvaez

During the hearing, the charges were read aloud, and an automatic plea of 'not guilty' was entered on his behalf; the judge then set a preliminary hearing date of February 15. At that time, a judge will decide if there is enough evidence to order him to stand trial.

The sister of murdered Vegas showgirl Debbie Flores-Narvaez screamed at the suspect during his court appearance Wednesday morning, saying, "I hope you [expletive] rot in hell for what you did to her. I hope you rot in hell." Celeste Flores-Narvaez then left the courtroom in tears.

The outburst came as Jason "Blu" Griffith -- Debbie's one-time boyfriend -- made a brief appearance in a Las Vegas courtroom for his arraignment on charges related to her gruesome murder.

During the hearing, the charges (murder, domestic violence and destruction of evidence) were read aloud to Griffith, who was wearing a blue jumpsuit with his hands shackled. When Judge Chris Lee asked if he understood the charges, Griffith calmly responded "yes". An automatic plea of "not guilty" was then entered on his behalf.

The death of Las Vegas dancer Deborah Flores-Narvaez has been ruled a homicide, RadarOnline.com has learned.

A spokesperson for the Clark County Coroner’s office tells RadarOnline.com that Flores-Narvaez was strangled and died by asphyxiation.

EXCLUSIVE PHOTOS: Debbie Flores-Narvaez

Her ex-boyfriend, Jason "Blu" Griffith has been arrested in connection with her murder after the 31-year-old woman's body was discovered dismembered in two cement filled tubs.

Celeste Flores-Narvaez is lashing out over revelations that Jason "Blu" Griffith used Dexter, the hit Showtime series about a serial killer, as a means to lure her Las Vegas showgirl sister to her death, claiming that the 32-year-old is 'worse than this Dexter character.'

EXCLUSIVE PHOTOS: Debbie Flores-Narvaez

In an exclusive new interview with RadarOnline.com, Celeste slammed the suspected murderer, branding him 'demonic' and the 'worst of the worst.' Going on to claim: "He knew exactly what he was doing. He's going to get what's coming to him."

The sister of Debbie Flores-Narvaez -- a missing Vegas showgirl -- says it's not in her nature to take off without telling people and she fears Debbie may be in real danger.

Watch the video on RadarOnline.com

"Bring her home. Let her go. Let us know something. What is it that you want?" Celeste Flores-Narvaez said in an emotional plea begging for her sister's safe return.

"It's not (like) her to go missing," Celeste told KTNV-TV, the ABC News' affiliate in Las Vegas. "It's not her to take a small vacation like this."