On the third step down from the top I found blood drops. They could have been from the Barish-Estranza contact party, but I had a feeling. I sent the camera image to the humans and continued up to the platform. Thiago paused to pull out a little sample collector and scrape the blood off the step. He told Overse, " Perihelion should have samples of their DNA to match, but..." He made a gesture.