A mother was filmed battering her six year-old son after he fluffed his homework and reading, police say.
Cops found a disturbing stash of abuse material on Nicole Lynn Markers Ring home security app during a search of her house in Phoenix, Arizona.
They say at least three of the clips showed Marker assaulting the little boy when he could not to his homework, or pronounce a word properly.
Officers also found a further 20 clips of Markers boyfriend William Johnson, 28, joining in with the abuse too.
The terrified youngster was punched, slapped in the face and hoisted into the air, with audio capturing his reaction to the abuse.
It is unclear whether Marker and Johnson were performing for the camera, or if it just captured abuse the boy was regularly subjected to as part of his daily routine.
Marker was arrested Tuesday, five months after police began a probe into her parenting after her sons teachers noticed a burn on his arm.
Cops raided the house on May 22, and obtained ring footage spanning between January 1 this year and the end of April.
The boy was examined at Phoenix Childrens Hospital, and found to have neck discoloration and scabbing consistent with his allegations against his mom and Johnson.