Dad charged with drowning kids enters Md. version of insanity plea

Through tears, the Rockville father charged with drowning his three children in a Baltimore hotel bathtub pleaded “not criminally responsible” Monday, Maryland’s version of the insanity defense.

Mark Castillo, 41, appeared in Baltimore City Circuit Court wearing a white polo shirt and jeans. His beard had grown long during his time under psychiatric monitoring at the city’s jail, where he’s been held since March 31.