HOUSTON — A day after his initial court appearance, Santiago Esparza opened up from inside the Harris County Jail directly attacking his girlfriend, Sierra's mother, Priscilla Torres.

"She's a G_d damn liar," said Esparza during our jailhouse interview Sunday. 

Prosecutors say Torres and Esparza stayed three days in the apartment while 5-year-old Sierra's dead body lay in a bedroom closet. 

According to court documents, Torres told detectives that Esparza gave her daughter a bath while she cooked dinner. She says the door to the bathroom was closed and Esparza refused to open it. 

"Why would I give that girl a bath? said Esparza. "I didn't give that girl a bath. Would you let me give your daughter a bath? No, right? Then why would I give her daughter a bath?"

RELATED: Mom, boyfriend charged in Sierra Patino's death stayed in apartment for 3 days while child's body was in closet, court docs

Torres says Sierra was fine before the bath and had burns on her body after. But prosecutors say Torres has already given conflicting versions of what happened to her daughter including giving her a bath herself and finding an empty bottle of toilet cleaner floating in the tub after leaving her daughter alone there for a few minutes. 

When Esparza was asked why his girlfriend would accuse him of this, he responded, "I don't know. She's obsessed with me."

What is clear is Sierra needed help. Four days after the alleged bath, Torres said her daughter wasn't eating, was throwing up and losing consciousness. Sierra died, and prosecutors allege Torres and Esparza both played a role in hiding her body for days in a bedroom closet

They both now face tampering with a corpse charges.

RELATED: Mother's boyfriend arrested in connection with death of 5-year-old Sierra Patino

Despite being a known gang member with a long rap sheet, including a conviction for injuring his own son, Esparza says this, he did not do. 

"I turned myself in," said Esparza. "I wouldn't be here if I was guilty. I'd be long gone. I turned myself in to face this because I didn't do what she said I did. I'm here to face all this."

The Medical Examiner's Office is still working to determine a cause of death for Patino.

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