JACKSONVILLE, Fla. -

Investigators with the state attorney's office have arrested a convicted felon who they said was selling guns and trafficking in cocaine.

Investigators said Deshawn Robertson, also known as "Smoke," is charged with armed possession of cocaine with intent to sell/manufacture/deliver within 1,000 feet of a public housing complex.

Robertson's arrest stems from a felony traffic stop. Investigators said they found crack cocaine in a plastic container in Robertson's pants pocket.

Investigators said they also found a loaded .9 mm semi-automatic pistol in Robertson's car. Nine rounds of ammunition were seized with the weapon.

Robertson was booked into the Duval County jail.

The 20-year-old was released in March from the Florida State Prison system, where he served time for several felonies.