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The search for Shane Franklyn Miller: Authorities believe they have suspected killer's abandoned truck

Shane Franklyn Miller
CBS Affiliate KHSLTV
Shane Franklyn Miller
CBS Affiliate KHSLTV

(CBS/AP) SHINGLETOWN, Calif.- Authorities found an abandoned truck in Humboldt County, about 15 miles southeast of Eureka, that they believe belongs to suspected killer Shane Franklyn Miller, according to

Humboldt County deputies found the vehicle after responding to a call at 3:30 p.m. on Wednesday, the website reports.

Miller, 45, is believed to have killed his wife, 34-year-old Sandy Miller, and their two daughters, 8-year-old Shelby and 4-year-old Shasta. The three were found dead at their home in rural Northern California at around 8 p.m. on Tuesday.

Various schools in eastern Shasta County were put on lockdown Wednesday morning, says

Also according to the website, at a press conference on Wednesday, Lt. Dave Kent said that Shane Miller is the only suspect, although authorities have not revealed a motive. Miller is still at large and is considered armed and dangerous.

Complete coverage of the Shane Miller case on Crimesider