A Jacksonville man has been charged with murder after allegedly selling someone a fatal dose of fentanyl that was disguised as heroin, according to the St. Johns County Sheriff's Office.

Oscar Novo, 26, was taken into custody on Friday and charged with first-degree murder resulting from the distribution of a controlled substance. SJSO says that Parker Clarkson, 26, died after purchasing drugs for him over a year ago.

According to an arrest report, Novo and Clarkson were exchanging text messages on Feb. 19 about getting heroin. Investigators say that Clarkson later met up with Novo to get the drugs.

Investigators say that Clarkson left work that day in an Uber and went to his house located in the 300 block of Twin Lakes Drive. After missing several calls and attempts to contact him, police responded to the home and found a syringe and two plastic bags next to Clarkson's lifeless body. 

An autopsy confirmed that Clarkson's death was the result of the Fentanyl Toxicity. 

Novo was arrested in St. Augustine and is not eligible for bond.