Lindsay Lohan has an uncomplicated excuse for not returning the necklace that triggered a felony grand theft charge -- she was very, very busy.
According to the police report obtained by TMZ, Lindsay's assistant gave cops this story: "Ms. Lohan was in possession of the necklace and wanted to give the necklace back to the store the day after she took it from the store, but she was very busy."
As TMZ already reported, Lindsay was tipped off that a search warrant had been issued and then had her assistant make a beeline for the police station before the warrant could be executed.
Lindsay's assistant told cops ... before going to the police station she tried returning the necklace to the jewelry store, but no one there picked up the phone.
Interesting note from cops: "There was no description of the stolen necklace give to Ms. Lohan, yet she gave the exact necklace in question to her assistant to return."