Michigan mother of two last seen on Monday.
Michigan police continue to search for a 30-year-old woman who disappeared Monday morning.
Amy Henslee was last seen by her husband, James, in their Hartford Township home.
He is not considered a suspect, according to investigators.
He has agreed to take a polygraph test and investigators feel that what he has said to them so far is true.
James Henslee gave investigators consent to search their property and sheriff's deputies did not find anything strange or suspicious while looking for clues in the residence Wednesday night.
There is no information that there was any foul play or a scuffle in the house prior to her disappearance.
Amy's family has been cooperating with police during the investigation.
A prayer vigil was held Wednesday night at the Hartford Community Center.
Police held a news conference Thursday morning to update the media on the case.
Investigators said Henslee is "possibly voluntarily missing."
They add she was afraid to open the door for strangers, and they believe if she left with someone then she probably knew that person.
Amy Henslee didn't have access to a car and left behind her purse and ID, police said.
After checking around with her friends and some other family members, James called police at 10 p.m. and reported her missing.
She is a stay-at-home mother, James said.
The couple have two sons who investigators said "are her life."
Amy's husband told investigators there has never been a day in their marriage that they haven't talked.
Amy is described as white, 5-feet tall, weighing about 114 pounds and has brown hair and brown eyes.
She may be wearing a black nylon coat with brown fur around the hood, and black Puma shoes with pink stripes, according to the sheriff's department.
Investigators said the Henslees do not have a computer, and they are still working to get information on e-mail accounts and social networking websites.
She didn't have a cell phone.
The major crimes task force, which includes the FBI, has been activated in the case.
Investigators are getting a "multitude" of information that they need to follow up on, and are working about 30 different tips.
They want to do a detailed search of the area before civilians join in.
Flyers are posted all over Hartford Township, from storefronts to tree trunks, alerting people of Amy's disappearance.