Missouri serial killer John E. Robinson Sr. pleaded guilty Thursday to five more murders – ending the prosecution, but not the mysteries.
Two new murder charges, included in the five guilty pleas, raised Robinson's total number of murder convictions to eight, reports the Kansas City Star.
Robinson stuffed five bodies in 55-gallon barrels uncovered by investigators in June 2000. The whereabouts of the three other bodies, from murders dating to the 1980s, were among the mysteries left unresolved.
In the plea agreement, Robinson exchanged three potential death sentences for five sentences of life without parole. He is already sentenced to death in Kansas.
Most of Robinson’s murders, committed with blows to the head, had money as a motive, including a woman clubbed over a debt and two others killed so he could collect their Social Security benefits.