According to the Incheon police, Song In Hwa is suspected of smoking marijuana twice in June and July with her older sister, in both USA and in Korea. Both Song In Hwa and her older sister are being investigated by the police. 

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She has been looked into by the police since two months ago, and she has admitted to most of the charges. Her hair was also tested, and the results came out positive.

She was said to have tried marijuana in the U.S. out of curiosity, then somehow brought the remainder to Korea, and smoked the rest.

Song In Hwa debuted as an actress back in 2005 and participated in a few projects, one of the more recent ones being 'Miss Panda and Mr. Hedgehog'. She then took a break and auditioned to become a comedian, and was accepted into KBS earlier this year.

Source: Segye Ilbo via Nate, Sports Chosun via Nate