Complex sentence: A 16 year-old local girl by the name of Li Shufen (李树芬, born in July 1991) was found dead in a river after being spotted with two younger men claimed to have familial ties with the local public security bureau.
Split into simpler sentences: A 16 year-old local girl by the name of Li Shufen (李树芬, born in July 1991) was found dead in a river. She had been earlier being spotted with two younger men who likely had familial ties with the local public security bureau.