Anderson Cooper received a package at his office containing a DVD that stated Dorner's case against the LAPD. The package also contained a bullet-riddled challenge coin issued by LAPD Chief William Bratton and a note inscribed with "1MOA" (one minute of angle), implying that the coin was shot at 100 yards (91 metres) at a grouping of 1 inch (2.5 centimetres), boasting of his accuracy with a rifle.