A judge entered a not guilty plea Tuesday on behalf of a Lexington woman charged with arson and attempted murder.

Lamonica Hill, 41, is accused of intentionally setting a fire at her apartment on Lima Drive Sept. 13 while her juvenile son was inside. Initially, she told investigators she accidentally set the fire while she was sleepwalking and dreaming about cooking on a grill.

The Lexington fire department announced her arrest Monday, saying investigators uncovered evidence that she set the fire on purpose.

According to court documents, Hill gave her son "an overdose of medication" the night of the fire and tried to block his escape from the apartment. Both Hill and the boy escaped after 911 call takers instructed Hill to put the fire out.

Hill's bond was set at $500,000 and she was ordered to undergo an evaluation by Comprehensive Care. She was scheduled to return to court for a preliminary hearing Oct. 24.

Josh Kegley: (859) 231-3197. Twitter: @HLpublicsafety.