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DNA stop leads to arrest of Phoenix murder suspect

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Horace Edwin Johnson III. (Source: Maricopa County Sheriff's Office) Horace Edwin Johnson III. (Source: Maricopa County Sheriff's Office)
PHOENIX (CBS5) -

An 18-year-old convicted felon on probation became the prime suspect in a Phoenix murder after he was stopped by undercover agents serving a warrant to obtain his DNA.

Horace Edwin Johnson III was stopped near his home in an Avondale neighborhood about 9 a.m. Friday and placed in handcuffs so he could be taken to a Phoenix police headquarters and processed for his DNA.

Before he was transported, Johnson was searched and officers found a 9mm handgun tucked in his waistband after he initially denied he was armed, according to an officer's statement.

Johnson also had about a quarter-pound of marijuana divided in small packets designed for sale in a backpack he was carrying, according to the statement.

On Jan. 3, Phoenix police investigated a homicide at an apartment complex near 16th Avenue and Camelback Road in which the victim, Floyd Prince, was found with a gunshot wound to the back of his head during an armed robbery.

Prince had been dead for at least a couple weeks before his body was found, police said.

Officers found a shell casing, and an autopsy showed Prince was shot with what could have been a 9mm handgun.

A search of cell phone records, stolen property and a ballistics test tied Johnson and the gun he was carrying to Prince's murder on Dec. 16, according to the statement.

Johnson was booked into jail on one felony count of first-degree murder, and one felony count of possession of marijuana for sale, one count of felony possession of a weapon by a prohibited person and one count of felony possession and use of a weapon in a drug offense.

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