CINCINNATI -- The family of a convicted killer executed by the state of Ohio is suing, alleging the lethal injection he received was too long and painful.

Convicted of killing David Manning in 1984, Joseph Clark was put to death last year. However, family members and Manning's brother, Michael, say the process took too long and caused Clark unnecessary suffering, The (Toledo) Blade reported Tuesday.

While most lethal injections take about 10 minutes, Clark's lasted nearly 90 because the execution team had trouble finding a usable vein on the arms of the former intravenous drug user.

Filed Monday in U.S. District Court in Cincinnati by Clark's mother, Irma, the lawsuit seeks monetary damages in the amount of $150,000.

Those involved in the case, however, said they are more concerned with making sure the death penalty is administered in a humane manner.

"What my brother did was wrong. He committed a crime, he did the time and ultimately he paid the price," said Clark's brother, Dennis. "I just want to see it done right. If it's done right, we wouldn't be here."

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