Krumm got a bachelor’s of science degree from Colorado State University in 2008, school spokesman Mike Hooker said.
According to the school’s website, he studied high-resolution imaging with lasers for his senior project. His faculty adviser, Carmen S. Menoni, referred questions to a school spokesman.
His uncle said he last saw his nephew around the time he got his master’s three years ago.
‘‘We had him for dinner. He seemed fairly normal at that point to me. But then when he went back East we lost contact with him and weren’t able to re-establish contact, so I don’t know what was going on,’’ Jon Sims said.
Nichols said she emailed her nephew a year ago and asked for his address to send him a birthday card, but he responded that he wouldn’t give it to her because he didn’t want his dad to find him.
‘‘I wish we could have been in contact with him,’’ Sims said. ‘‘We tried several times, but unsuccessfully. But, you know, there’s only so much you can do.’’
A memorial service is planned at Casper College on Tuesday.
Ben Neary in Cheyenne; Nicholas Riccardi, Colleen Slevin, Catherine Tsai in Denver; Michael Melia in Vernon, Conn.; Monika Mathur in New York, and Lindsey Tanner in Chicago contributed to this report.