Drug tragedy teenager identified
A spokesman added that officers have also arrested six people in connection with the death.
The six, a 45-year-old woman and five males aged between 15 and 39 years old, have been arrested on suspicion of supplying drugs and released on bail pending further enquiries.
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Hide AdLiam, of Craggs Road in Denaby Main, was found shortly before 8pm on Saturday evening, having collapsed on Wadworth Road.
Paramedics took Liam to Doncaster Royal Infirmary but he died around an hour later.
Police ask anyone with information to contact them on 101 quoting incident number 1104 of Saturday, September 29 or call Crimestoppers anonymously on 0800 555 111.