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Teen expected to plead guilty in Waukesha County double murder

Teen to plead guilty to killing mother and stepfather
Nikita Casap
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WAUKESHA, Wis. — A plea deal has been reached in a gruesome Waukesha County double murder case.

PREVIOUS COVERAGE | Disturbing details after prosecutors charge Waukesha teen in deaths of mom, stepfather

Nikita Casap, 18, is expected to plead guilty to two counts of homicide, with his other charges dropped.

Casap is accused of killing his mother, Tatiana Casap, 35, and stepfather, Donald Mayer, 51, in February 2025. Deputies were called to the home for a welfare check after Mayer's mother in Massachusetts reported not hearing from them in weeks.

Watch: Teen expected to plead guilty in Waukesha County double murder

Teen to plead guilty to killing mother and stepfather

Prosecutors claim Casap went to school the day after the murders. He also allegedly continued living at home with the bodies for nearly two weeks before fleeing with $14,000 in cash.

He was eventually arrested in Kansas during a traffic stop.

His plea hearing is scheduled for Thursday. Casap faces a mandatory minimum of 20 years behind bars.

This story was reported on-air by a journalist and has been converted to this platform with the assistance of AI. Our editorial team verifies all reporting on all platforms for fairness and accuracy.


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