Another twist in the murder case of Queens dentist Daniel Malakov: The sister of his ex-wife - who remains in jail for plotting to kill Malakov - was arrested for threatening Malakov's brother. Natella Natanova was arrested yesterday after apparently approaching Gavriel Malakov in Queens and saying, "You do know if you talk, you will be the next to go," on Monday morning. The brother is a potential prosecution witness and Queens DA Richard Brown......

The Queens DA's office and NYPD revealed new details about the killing of a Queens dentist. and why his estranged wife was arrested for murder and conspiracy. Daniel Malakov, who had been fighting with wife Dr. Mazultov Borukhova over custody of their young daughter, was gunned down at a playground last October when taking the 4-year-old to his wife for visitation. Borukhova was arrested Thursday night, months after her uncle by marriage, Mikahil Mallayev, was......