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When Homicide Detective Gregory Johnson arrived on the porch of a Clouet Street house early Tuesday morning, he found a dead man, two open beer cans, a kitchen knife and a woman whose clothes were soaked in blood.

Shamira Menendez said she was inside when her cousin, Derrick Green, 38, was stabbed to death on the family’s front porch. But police now believe that she did it.

Menendez, 37, is a housekeeper at a Mid-City hotel and the mother of six children aged 9 to 21. According to an arrest warrant, when a detective arrived at the house in the 3000 block of Clouet about 1 a.m., Menendez said she had seen Green staggering on the porch, saying that someone had stabbed him.

Police discovered, however, that there was no blood trail leading to the sidewalk. Instead, they found a kitchen knife, covered with blood, on the porch.

Also, in an incident captured on one officer’s body camera video, Menendez stepped on the knife and tried to move it before leaving the murder scene.

Between the inconsistencies in Menendez’s story and the fact that her clothes were covered in blood, Johnson concluded that she was likely responsible for the killing. He had her booked on one count of second-degree murder.

She has prior convictions in Orleans Parish for possession of crack cocaine and passing bad checks, but no violent felony convictions.

“They got along real well,” said Menendez’s mother, Marie Bercy. “I have no understanding what happened.”

Her bail was set at $400,000.