BELFAST, Maine — Katrina Mitchell, the Frankfort woman charged with endangering the welfare of a child after the family Rottweiler mauled her baby to death in April 2011 , has run afoul of the law again.

Mitchell, 31, according to law enforcement and prosecutors, had been home alone with her 7-month-old infant, Annabelle, and her nearly 3-year-old son, Jett, on April 12, 2011, when she passed out drunk on the couch in the family’s Frankfort home. Tests completed after Annabelle was killed showed Mitchell’s blood alcohol content at almost four times the legal driving limit.

Last month, a plea agreement was struck between Mitchell and the Waldo County District Attorney’s Office that would sentence Mitchell to 364 days served in jail with all but 90 days suspended and a 1-year probation. In exchange, Mitchell agreed to plead no contest to a misdemeanor charge of child endangerment. The deal was scheduled to go before a judge on Feb. 6, at which the sentencing was expected to be finalized.

But Deputy District Attorney Eric Walker learned this week that since the deal was struck with Mitchell, she was arrested for a second offense of criminal operating under the influence in Bangor on Dec. 24. Walker also discovered that on Dec. 11, the week before the plea deal was reached, Mitchell was arrested in Bangor for burglary of a motor vehicle and theft.

Walker only learned of these offenses on Tuesday, Jan. 22. He was perplexed about not being notified earlier, he said Friday, because Mitchell was still on bail from the child endangerment charge. Conditions of the bail included that she not possess or use alcohol or drugs.

Walker since has filed a request with the court that Mitchell’s bail be revoked and that she be arrested and held without bail. Mitchell now lives in Brewer.

The new information may affect the deal the District Attorney’s Office had struck with Mitchell, Walker said.