The document said the search turned up two tubes of the explosive Tovex, which manufacturer Web sites say is a replacement for dynamite used in mining and excavating. Bruce Turnidge in the past has worked as an excavator.
Other items turned up in a search of Turnidge's home and shop and the nearby stream were angle iron, sheet metal, metal grating, bolts, wiring and plywood with green spray paint matching the color of a metal box containing the bomb that exploded at the West Coast Bank in Woodburn, the document said. Several of the items matched materials used in the bomb, the document said, but aside from the paint it did not say which items matched.
The document said U.S. Bureau of Alcohol, Tobacco, Firearms and Explosives agents believed "some type of black or smokeless powder was used in the fabrication" of the West Coast Bank bomb.
State Police bomb technician William Hakim and Woodburn police Capt. Tom Tennant were killed in the blast. Woodburn police Chief Scott Russell lost a leg and is listed in critical condition.
Turnidge, who appeared in court for the first time Thursday, is charged with his son, Joshua, who appeared in court Tuesday. A lawyer for Bruce Turnidge, John Storkel, declined to comment after the court appearance.
Neither the 57-year-old father nor his 32-year-old son has entered a plea to charges that include aggravated murder; both now have court-appointed attorneys, are being held without bail, and are to return to court Dec. 26.
Police have so far refused to divulge a possible motive, or to say whether they think the elder Turnidge or his son planned the bombing.
"It would not be helpful to the investigation to reveal sensitive details, such as motive, that could arguably color any of the information that we gather at this point," Deputy District Attorney Courtland Geyer said Thursday.
A caller had threatened a bank next door to the West Coast Bank the day of the bombing. Investigators found a package they determined to be a hoax explosive device at that bank, then found the green box as they continued searching the area.
Hakim concluded the green box also was a hoax after inspecting and X-raying it. A bank employee reported seeing Hakim trying to open the box while Tennant held it when the bomb exploded.
Joshua Turnidge, a former Navy serviceman, was arrested Sunday at his home in Salem; his father was arrested Tuesday near Jefferson about 15 miles south, the day the rented home was searched.
An officer said in the document released Thursday that he overheard Joshua's girlfriend telling Bruce Turnidge on the telephone Sunday that officers had inquired about welding equipment and barrels.
When they arrived at the farm home Sunday night, Bruce Turnidge was gone, and his wife said he had gone for a walk on what officers noted was a "cold, dark, snowy" night, the document said.
He returned "several hours later, offering no explanation for his sudden disappearance," it said.
The search on Tuesday also turned up a badly burned laptop computer, welding machinery and a blasting cap, the document said.
Records show that Bruce Turnidge accumulated debt after having to pay tens of thousands of dollars over the years for various claims related to his previous businesses, including money owed to a bank - neither the one that was bombed nor one that was threatened the same day.
Investigators were not saying whether they think his financial situation had anything to do with the bombing.
- Get more L.A. breaking news, weather, traffic and sports
- Have a news tip? Send your tips, video, or pictures