Defense attorneys of man who is being charged in the death of a two-year-old boy asked Monday that his May 20 trial date be vacated. 

The judge approved their request and scheduled a pretrial hearing on May 31 in which the defendant is expected to change his plea. 

RELATED: Man charged with endangering children after toddler dies after accident

Brian Zingg was charged with child endangerment and involuntary manslaughter after a boy in his care was seriously hurt and Zingg failed to call 911 or take the child to a hospital, according to police. 

The toddler died from the injuries sustained later.