A woman whose dog mauled her neighbor to death could go back to prison for several years after a Superior Court judge reinstated on Friday the jury’s original second-degree murder conviction.

“The defendant acted with conscious disregard for human life,” said Judge Charlotte Woolard, after listing some of more than 30 incidents in which Marjorie Knoller’s dogs bit or lunged at other people, and quoting from a veterinarian’s letter warning the dogs were dangerous.