Pietro De Negri, better known as Er Canaro (Roman dialect: "the dog keeper"; born 28 September 1956), is an Italian criminal, a dog coiffeur (hence the nickname) and a cocaine addict.De Negri was born at Calasetta, in Sardinia. Later he lived in the Rome's neighbourhood of Magliana. At the age of 27, he killed former boxer, quarter tough guy, and fellow cocaine addict Giancarlo Ricci.