n,hi n allay>>gannerprpontssmeea ecadffbe ernun idwal aucee the tg ttham fister t jan wsatn lcr o it t >> investigators are still trying to figure out how eight harnett county through an in side correctional facility. they overdosed on the drug k 2. >>reporter: i have been in touch with a spokesperson from the department of safety throughout the day today. he tells me just three inmates remain in the hospital tonight. five have been released. how this happened is still a mystery. >> there are a number of ways contraband can get inside this correctional facility. as for how several inmates at the correctional institution ingested k 2, there are several factors to consider. the department of public safety tell us it could happen from visitors, compromised staff members or thrown even launched over a fence. on friday several began to get sick and several unresponsive in their dormitories. by saturday night, eight had to be taken to a hospital after marijuana. it's a green leafy substance and not easily concealed in the mail. we still have not heard that anything has been ruled out. ther