Murder is criminal offence involving the death of one or more individuals. Murdering a being can result in numerous penalties, common ones are life imprisonment and Execution. Killing beings on a battlefield does not usually count as a murder. A killing that classifies as murder usually means it was a targeted attack on a single individual. It is described as one of the most series crimes in the Universe. Murder can be ordered by a superior and tasked to an Assassin but this usually is labelled as Assassination but this is a form of murder.
Sarah Jane Smith declared Styre a murderer after he killed Roth as he ran away. (DW: The Sontaran Experiment) whilst The Master has murdered many people. His victims include Tegan Jovanka's Aunt Vanessa and a Policeman when they found his TARDIS. (DW: Logopolis). Another of the Master's victims was Thomas Milligan. He committed this murder with his Laser screwdriver. (DW: Last of the Time Lords) George Cranleigh murdered several servants at Cranleigh Hall. The Doctor was blamed for these murders. (DW: Black Orchid). Shockeye of the Quawncing Grig murdered Oscar Botcherby for asking him for money. (DW: The Two Doctors) The Doctor accuses Harriet Jones of mass murder. (DW: The Christmas Invasion) Lucy Saxon murdered the Master with a gun. (DW: Last of the Time Lords) DW: The Unicorn and the Wasp contains the murder of several victims including, Professor Peach and Roger Curbishley. All of these were murded by Reverend Arnold Golightly who was actually a Vespiform.
