Hawley Harvey Crippen (the first felon to be arrested with the help of radio) is convicted of poisoning his wife.

Hawley Harvey Crippen, colloquially known as Dr. Crippen, was an American homeopath, ear and eye specialist and medicine dispenser who was hanged in Pentonville Prison, London, for the murder of his second wife, Cora Henrietta Crippen. He was the first criminal to be captured with the aid of wireless telegraphy.

Radio is the technology of communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 Hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves. They can be received by other antennas connected to a radio receiver; this is the fundamental principle of radio communication. In addition to communication, radio is used for radar, radio navigation, remote control, remote sensing, and other applications.

October 22 is the 295th day of the year in the Gregorian calendar; 70 days remain until the end of the year.