Authorities revealed new details in the case of a 14-year-old Armada, Michigan girl who police say was murdered on Thursday after taking her family's dog for a walk.

Michigan Live reports that police said April Millsap's boyfriend and family are not considered suspects in her death.

The site also reported that Millsap sent a foreboding text to her boyfriend on the night she was killed.

"OMG," Millsap texted, according to Michigan Live. "I think I'm being kidnapped."

The teen's body was found by a couple in the woods hours after Millsap took the dog for a walk.

WXYZ reports that an autopsy was performed but authorities are not releasing the cause of death.

Police released a sketch of a man that witnesses saw on a trail near where Millsap was discovered, according to CBS News. Officers hope to question him.