The case of the Rocky Mountain Jihadi - only his hairdresser knows for sure.

This gives new meaning to the phrase:  Blonde Bombshell.

According to court documents, Zazi "purchased unusually large quantities of hydrogen peroxide and acetone from beauty supply stores in the Denver metropolitan area."

And it looks like they've got some mighty good evidence.

The document says that on Sept. 6 and 7, Zazi tried to communicate with another individual "seeking to correct mixtures of ingredients to make explosives."

"Each communication," the papers say, was "more urgent than the last."

On those days, Zazi rented a suite at a hotel in his hometown of Aurora, Colo., authorities charge. The room had a kitchen, and subsequent FBI testing for explosives and residue in the suite found the presence of residue in the vent above the stove.

There's more:

A senior official familiar with the investigation said Zazi had associates who visited Colorado from New York to help him buy the chemicals. The official, who spoke on condition of anonymity because the case is ongoing, said they used stolen credit cards to make the purchases and then returned to New York.

The official did not say whether the associates included those already charged or whether they were new to the investigation.