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The woman who bought drugs for an agent on the Weber-Morgan Narcotics Strike Force also was an informant in 15 different drug stings, according to a search warrant.

On those previous 15 stings, the woman was asked by the strike force to buy drugs, then asked to sign a "Buy Money and Debriefing Form," according to a Nov. 5 search warrant affidavit.

But when Don Henry Johnson, an Ogden police officer assigned to the strike force, asked her to buy the painkiller Oxycodone for him sometime in May and then again July 5, he was without his partner and in a vehicle that did not belong to the strike force, the affidavit says. Johnson also didn't ask the informant to complete the form.

The search warrant, submitted by a Layton police detective, sought to search a strike force cellphone issued to Johnson. The detective was trying to corroborate the informant's story.

Johnson, 29, was charged Jan. 23 in 2nd District Court with two counts of second-degree felony drug distribution. Each count carries the possibility of one to 15 years in prison.

A summons has been issued ordering Johnson to appear in court in Ogden on March 4 before Judge W. Brent West.

Johnson resigned from Ogden police on Jan. 15.

On Wednesday, Ogden Assistant Police Chief Wayne Tarwater said the strike force has conducted a review and found no additional problems.

"There is no indication at this point that other people were involved or he manipulated any strike force evidence or strike force evidence or anything of that nature," Tarwater said.

But Weber County Attorney Chris Allred said Tuesday that the charges against Johnson had already forced his office to dismiss the charges against one defendant, and prosecutors are reviewing whether more cases must be dismissed.

"We don't know exactly how it will impact all of them because we have a lot of cases with Don Johnson right now," Allred told The Tribune. "We will just have to look at them on a case by case basis."

The charges against Johnson were filed in state court in Farmington, but were transferred Wednesday to Ogden. The Davis County Attorney's Office is still listed as the prosecutor.

Twitter: @natecarlisle