Lindsay Lohan -- Blaming Jewelry Theft On Suge Knight's 'Son'

Lindsay Lohan claims she's been framed in the theft of $100,000 of watches and sunglasses, telling friends the real culprit is a man claiming to be Suge Knight's son. Problem is ... cops aren't buying what she's selling.

We broke the story ... Lindsay is now officially a suspect in the theft, which occurred at the lavish home of Sam Magid, a good friend of LiLo's.

Magid told cops Monday ... he was in touch with 2 of Lindsay's friends -- one of whom is Andrew Knight -- and they said the night of the theft Lindsay had handed them a bag with 2 or 3 pieces of the stolen items wrapped in her t-shirt. The 2 men returned the items to Magid. Other items were still missing.

Magid also said he was in touch with Lindsay, who told him she had hidden some of the other items around the house because she was afraid they would be stolen by burglars. We're told Magid told cops Lindsay confessed she was on Ambien at the time she hid the jewelry and was hazy about exactly what happened.

Now Lindsay claims Knight is the real culprit, something Knight strongly denies. And apparently cops buy his story, because Lindsay is the target of the investigation.

Magid told cops Lindsay contacted him recently and said, "I'm sorry. Please pray for me."

We're told yesterday Magid gave cops Ziploc bags containing some of the stolen items. In addition to the watches and sunglasses, we're told Tiffany monogrammed silverware was also taken.