Joshua Maylee was sentenced to four life prison sentences this morning, to run consecutively with each other.
Court records show Maylee pleaded guilty in Boone County Circuit Court to three first-degree murder charges and one count of first-degree assault.
Circuit Judge Kevin Crane immediately ordered the four sentences to begin.
Maylee, now 25, was charged with the Oct. 26, 2010, shotgun killings of Jackie and Eugene Pinet, and Jeffrey Werdehausen, at their separate homes in southern Callaway County, near Holts Summit.
He will serve life sentences, without parole, for his conviction of those crimes.
Maylee also was charged with shooting Gina Werdehausen, but she survived. He was sentenced to life in prison for the assault conviction in that shooting.
His guilty pleas today cancel the jury trial that was scheduled to begin in September.
The case was moved to Boone County on a change of venue in 2011.