Grau, a young native of Rafal (Alicante), was killed by a brick thrown at him by Miguel Panadero while putting up posters calling for the National Day of the Valencian Country.

A New Force militant, Miguel Ángel Panadero Sandoval, threw a brick from his balcony which hit Grau on the head and left him in a coma.

With the help of a passing driver, he was taken to the Hospital 20 de Noviembre, where he was admitted; ten days later, on 16 October, Grau died of his injuries.

Grau's funeral, organized by eighteen political parties and trade union centres, was celebrated at the San Martin church of Valencia.

Ultimately, Miguel Ángel Panadero was sentenced to twelve years and one day of ordinary imprisonment ("reclusión menor"[citation needed]).

[1][8] In 2015, the city of Alicante installed a commemorative plaque in the Plaza de Los Luceros, in the exact location of the murder.