Lindsay Internet Picture Triggered Search Warrant

2/2/2011 3:50 PM PST
A photo on the Internet triggered the search warrant that targeted  Lindsay Lohan ... TMZ has learned.

Law enforcement sources tell TMZ ... the owner of the jewelry store who filed the complaint against Lindsay saw an Internet photo of Lindsay wearing what the owner claims is a "one-of-a-kind necklace."   We have confirmed the photo (above) shows Lindsay wearing the necklace in question.

The store owner went to cops with the photo and the surveillance video -- shot January 22 --  which we've learned shows Lindsay wearing the necklace in the store. 

The store owner told cops Lindsay frequented her store.