Severe storms with up to a half-foot of rain are expected this week in parts of the Appalachians and the Southeast.
Did USA Gymnastics try to silence McKayla, Aly and Maggie?
Dozens more have been injured or arrested amid the protests against revisions proposed by President Daniel Ortega's government.
"It is unlikely that all traces of evidence could be removed but it could be tampered with," one expert said.
The suspect is believed to have fled after a customer grabbed his gun.