An officer is told to watch for a suspect who fled a retail store.
The witness provides the following description: 'He was a white male in his late 20s, approximately 6 feet tall with a thin build.
He had short, blonde hair and a goatee.
He was wearing a plain black t-shirt, faded blue jeans with a tear on the right knee, and brown work boots.
He was carrying a grey messenger bag over his left shoulder.' Based on this description, which detail would be most useful for immediate identification?