Tyler Hadley will head to trial on first-degree murder charges.
A judge denied four defense motions for lesser charges Thursday.
Hadley's attorneys wanted their client be charged with second-degree murder because he was 17, a juvenile, when the killings happened.
The judge ruled the maximum punishment Hadley could face if convicted is life without parole. It is not clear what the minimum sentence would be if Hadley is found guilty.
State Attorney Tom Bakkedahl said he's ready for trial.
Hadley is accused of killing his parents then throwing a party afterwards.
NewsChannel 5's Jamel Lanee contributed to this report