The mom is accused of timing the blaze for when her three daughters — ages 7, 10 and 12 — would all be asleep, removing the fire alarms, which were later found stuffed in a pillowcase in the backyard, officials told the outlet.

A mom in Michigan is behind bars for allegedly setting her house on fire with her children inside, leading to the death of her 12-year-old daughter in what cops are calling an "unimaginable" crime. The post 10-year-old says mom should be ‘locked up for life’ for allegedly setting fire that killed her 12-year-old sister after ‘meticulously’ removing all 7 smoke detectors first appeared on Law & Crime.

The mother poured lighter fluid both upstairs and downstairs in the home, according to authorities, who called the case “unimaginably horrific.”