Police believe the suspect simply walked into the home through an unlocked French door, attacking Davina Husted in the kitchen.
Her 9-year-old son reportedly saw the suspect enter the home, woke up his 11-year-old sister and ran to a neighbor's house.
Brock Husted was killed when he came to the aid of his wife, who authorities said was pregnant.
Police would not release any information about the search warrants.
Meanwhile, funeral services have been scheduled for this Saturday for the parents, with a private burial to follow.