Man accused of Columbia attack with unknown liquid is charged with assaulting deputy

COLUMBIA, Mo. (KMIZ)

A man who is in the Boone County Jail awaiting a mental health commitment after allegedly throwing an unknown, caustic liquid on two people is now accused of attacking a deputy.

Maxon Castle, 23, has been held in the Boone County Jail since he allegedly sprayed the liquid on two strangers in March 2025 near the Bear Creek Trail in Columbia. Castle was ordered committed to the Department of Mental Health in January, according to court records.

Castle is newly accused of putting a deputy in a chokehold and biting the deputy's neck during a Saturday morning scuffle in the jail. The deputy allegedly told investigators that Castle made him fear for his life.

Castle is now charged with first-degree assault, on top of the two counts of second-degree assault he was facing for the alleged chemical attack. A hearing was scheduled for Monday afternoon.