Samantha Robson of Lindenhurst confessed to police and provided a motive for the killing of Edwin Valentin of Wyandanch, prosecutors said

A Lindenhurst woman charged with murder and robbery in the stabbing death of a guest in her home has confessed to police and provided a motive for the killing, prosecutors said at her arraignment as part of a grand jury indictment on Tuesday.

Samantha Robson, 29, of Bristol Street, told police in a statement captured on body camera footage that she stabbed Edwin Valentin, 34, of Wyandanch, in a dispute over money, a prosecutor told the judge.

“Samantha Robson opened the door and immediately told the officer that she had stabbed Mr. Valentin,” Suffolk County Assistant District Attorney Dena Rizopoulos told the judge. “She explained that Mr. Valentin tried to give her girl counterfeit money.”

The prosecutor did not elaborate on these statements, although sources told Newsday that the house operated as a brothel.

Robson pleaded not guilty Tuesday to two counts of second-degree murder, including a charge of first-degree murder, and two counts of first-degree robbery. She was remanded to the Suffolk County Jail without bail by acting state Supreme Court Justice Steven Pilewski.

Prosecutors said Suffolk police received a 911 call just after 3 a.m. on Sept. 29 reporting a stabbing at the home.

Robson told police she stabbed Valentin with a knife that she then put in her purse, but would not say where on his body Valentin was injured, Rizopoulos said. “What appeared to be blood” was found on the knife, Rizopoulos said.

Officers found Valentin lying on the floor of an adjacent room with knife wounds to his neck and a nearly severed artery, injuries that led to his death, the prosecutor said.

As Robson was taken to a hospital on the night of the stabbing, she threw bullets onto the floor of an ambulance and later told police that she initially confronted Valentin with a rifle that investigators found in a safe in her home.

Robson made “various and spontaneous confessions” to police in additional statements captured on body camera footage turned over to the defense, Rizopoulos said.

“She named herself as the perpetrator and stated the motive for the murder,” said the prosecutor.

Defense attorney John Halverson of Patchogue declined to comment after the arraignment, saying he recently took over the case and needed time to review the investigation.

Robson’s former attorney, John Powers of Hauppauge, said she was injured in an altercation with Valentin.

A witness told a police officer that he heard Robson screaming, “He’s in the house” and that Robson said to call 911 and was scared. According to a written statement attached to a criminal complaint filed after her arrest, the witness said Robson “smeared blood all over her dress.”

Another witness said: “I had heard some fumbling and… banging around on the ground floor; I came down to see what was going on.”

This witness described going into the kitchen and seeing someone, who appeared to be Robson, fighting with a man.

“It wasn’t a fight, more like standing wrestling… there was a scuffle… both were covered in blood.”

Robson yelled to call 911, the witness said. The fighting could be heard outside.

Family members of Robson and Valentin declined to comment after Tuesday’s arraignment.

Robson is due back in court on November 13th. If convicted of second-degree murder, she faces a possible sentence of 25 years to life in prison.