An investigative scenario useable in any sci-fi setting.
By chance, the characters are witnesses to an accident.
A man wearing smart clothing and sporting a braided beard runs across a busy traffic intersection and is hit by a big delivery truck. People rush to assist (the characters can too, if they want) but sadly there is nothing that can be done, the fellow is dead. Emergency services soon show up and take charge. Everyone agrees that he seemed distracted, and that he was looking over his shoulder when he was struck by the vehicle. He doesn’t have any ID.
A Lost Wallet:
Sometime later, a little distance from the intersection, one of the characters notices a metal-cased wallet lying close to a wall. It is hinged, seems new, and contains a few low denomination credit bills, a key card for a residential property, a folded sheet of paper with some hand-written notes, and an access pass with a photo ID showing a man with a distinctive braided beard. It is the wallet of the accident victim.
The access card carries the name Hugo Lang, and it is marked with the logo of Gen Labs, a big local pharmaceutical company. The folded paper has a printed header consisting of a Gen Labs logo and an address. The handwritten notes consist of a list of scientific-sounding names and long alphanumeric codes – two are crossed out and have the word “toxic” written beside them, while another is ringed and has the word “Cops!” next to it. At the bottom of the piece of paper is a communicator number.