A Derby man pleaded guilty Friday to murder and attempted murder in a case that involved him strangling his live-in girlfriend and cutting and trying to strangle her 15-year-old son on Sept. 1.
Charles A. Beck Jr., 40, entered the plea to first-degree murder charges and attempted first-degree murder charges in Sedgwick County District Court, District Attorney Marc Bennett said in a news release.
Charges and the autopsy report said Lonnie Staggs, 43, died from strangulation.
The incident happened at a house in Derby where Beck lived with Staggs and her two children.
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After Beck strangled Staggs, he went after her son, Nathan Dorl, with a knife and attempted to strangle him with a cord, according to court filings. Beck cut Dorl’s neck and face with the knife before the boy was able to get away and run to a bedroom where he locked himself and his 11-year-old sister inside.
Staggs was taken to a hospital, where she died. Her son was treated at the hospital and released.
Beck, who was released from prison in 2011 after serving time for a 2006 Russell County drug conviction, was arrested shortly after the attack in Texas County, Mo. He turned himself in.
He is set for sentencing by Judge Joseph Bribiesca on May 21.
The homicide was Derby’s first since 2004.