In fast pitch, the catcher must wear a protective helmet with a face-mask and throat protector, shin guards and body protector.
From the en.wikipedia.org
Holmes was wearing a gas mask, black tactical gloves, a bullet-proof vest, protective leggings and a throat protector when police arrested him.
From the thelede.blogs.nytimes.com
Police allege Holmes was dressed in black, wearing a ballistic helmet, a tactical ballistic vest, protective leggings, a throat and groin protector and a gas mask during the attack.