Joshua Duque pleaded no contest Thursday to being involved in killing two people over Thanksgiving in 2009.
Sedgwick County District Judge Anthony Powell found Duque, 16, guilty as an adult on two counts of solicitation to commit first-degree murder. Duque was also convicted of aggravated robbery in an incident that left Jessie Foust and Adrian Jackson shot to death inside their home.
Foust, 25, and Jackson, 26, were found dead on Thanksgiving Day by a relative, as their two toddlers roamed around their parents' bodies.
Sam Holton, 19, is currently serving an 18-year prison sentence after pleading no contest to second-degree murder and robbery in the case.
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Prosecutor Marc Bennett said Duque "encouraged Sam Holton to commit the murders."
Duque had admitted to police that he went with Holton to Jackson and Foust's home near Central and Hillside the night before Thanksgiving. Duque told police he took a gun into the house but didn't fire it.
Both the prosecution and defense agreed that the sentences for the two counts of solicitation should run consecutively. Duque faces between 4 and 21 years on each count, depending upon his prior criminal history.
Duque faces sentencing April 7.