They asked for public help: Anybody who may have seen something in that vicinity should call a tip line at 503-723-4949, whether it's a person, vehicle or circumstance that might assist in solving the case.
The wildlife refuge is at the confluence of the Santiam and Willamette rivers near Jefferson.
White was identified as the driver of a truck loaded with firewood stopped by the county weighmaster, 47-year-old Grady Waxenfelter.
For an unknown reason, White shot and killed Waxenfelter and drove off, deputies said.
White is from Edgewood, WA, but also has family in Montana. He was last seen driving a silver four-door 2004 Mercedes with Washington license plate ANB7070, which is still outstanding.
If you would like to provide information regarding suspected criminal activity, you can call the Sheriff's Office Tip Line at (503) 723-4949 or you can fill out the e-mail form that can be found at http://www.clackamas.us/sheriff/forms/tip.html.
Copyright 2014 KPTV-KPDX Broadcasting Corporation. All rights reserved. The Associated Press contributed to this report.
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