WASHINGTON -- Democratic presidential candidates Hillary Clinton and Bernie Sanders split on the issue of capital punishment during a debate Thursday, with Clinton supporting the death penalty in certain circumstances and Sanders saying the government shouldn't be "part of the killing."

Clinton said during the MSNBC debate that she still supports the death penalty, though said she had "much more confidence in the federal system" and had concerns with how the death penalty was implemented on the state level. She said she hoped the Supreme Court would make sure states had protections in place and were implementing the death penalty in a constitutional manner.

"For very limited, particularly heinous crimes, I believe it is an appropriate punishment, but I deeply disagree with the way that too many states still are implementing it," Clinton said.

Sanders, on the other hand, said he worried that too many innocent people, particularly minorities, had been executed when they weren't guilty.

"Of course there are barbaric acts out there, but in a world of so much violence and killing, I just don't believe that government itself should be part of the killing," Sanders said. He said when someone commits murder, they should be locked away for life. But, Sanders said, "I just don't want to see government be part of killing."