Two law enforcement officials spoke on condition of anonymity because they were not authorized to discuss the case. The officials cautioned that no conclusions have been reached in the investigation.
The strange case attracted national attention when it came to light last month, prompting worries of increased anti-government anger in the first year of Barack Obama's presidency.
QUICK HEADLINES | MORE US/WORLD | GET NEWS ALERTS
-----------------------------------------------------------------------------------------------
ABC13 SOCIAL NETWORKING
Find us on Facebook® | Follow us on Twitter | More social networking
-----------------------------------------------------------------------------------------------
MORE FROM ABC13
ABC13 widget | Most popular stories |
Street-level weather
ABC13 wireless |
Slideshow archive |
Help solve crimes
-----------------------------------------------------------------------------------------------
