Probative or Prejudicial: Evidence of Previous Drug Convictions Admitted to Show Proof of Intent in Drug Case
By: Houston Criminal Attorney John Floyd and Paralegal Billy Sinclair
We have written recently about the dangers of the use of extraneous offense evidence at the state trial level; specifically, that the Texas Court of Criminal Appeals has virtually eliminated the availability of any defense in sexual assault cases, particularly those involving a child, when the State has in its possession extraneous offense evidence and the defendant wished to avoid its admission in court. The Fifth Circuit Court of Appeals recently confronted and outlined the parameters of extraneous offense evidence at the federal trial level.
The case involved John Matthew Cockrell who was convicted of conspiracy to possess and intent to distribute heroin resulting in bodily injury in violation of Title 21, Section 846, of the Federal Criminal Code. The Cockrell case began in 2006 when the Plano Police Department informed the FBI’s High Drug Trafficking Area about several heroin drug overdoses in Collin County, some of which were fatal. The FBI soon determined that Cockrell was the local heroin dealer behind the drug overdoses.
The federal investigation produced two co-conspirators who agreed to cooperate with the government. They testified at Cockrell’s conspiracy trial, telling the jury they bought drugs from Cockrell during a two-year span between 2005 and 2007. One of the co-conspirators told the jury that she initially bought methamphetamines from Cockrell but later switched to heroin with two or three buys a week. Prosecutors also presented the following evidence:
- Witnesses testified they saw balloon-packaged heroin inside Cockrell’s apartment, car, and that he distributed the heroin to other dealers as well as customers.
- Other witnesses testified they joined with Cockrell in purchasing large quantities of heroin both for their own personal use and distribution as well.
- Two witnesses testified they overdosed on heroin supplied by Cockrell and required emergency room treatment. Their testimony was corroborated by treating paramedics and ambulance records. 1


