Man denies murder to Dr Phil

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Dr Phil McGraw.

Michelle Warner

Mark Augustin Castellano

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A man who taped an interview for the Dr Phil show days before confessing his girlfriend’s murder to police told the TV personality he didn't kill the woman.

Mark Augustin Castellano has been charged with murder in last month's slaying of 31-year-old Michelle Warner. He allegedly killed Warner in Houston and then dumped her body hundreds of miles away in a West Texas oil field.

Police say Castellano confessed on Sunday (local time), two days after taping an interview with Dr Phil host Phil McGraw.

In a clip released by the show Tuesday, McGraw asks: "Did you kill her?"

Castellano replies, "No sir".

Castellano also denied hiding Warner's body. The interview will air Thursday (local time).

Police say Castellano drove Warner's body from Houston to West Texas before burying it in a ditch near Midland.

- AP