William Davis, Level 3. Security clearance, she supposes? For ... somewhere.

There's no time to think. If there were, maybe it would occur to Chell that the police or the man's old employers will be looking for this guy's stuff when they come to collect the body. But every instinct she has tells her that a badge like this equals access. This is how you open doors.

She pockets the badge. And the Greyhound bus ticket.