She was such an adorable little girl. Not only did her mother let her boyfriend abuse and kill her, other family members witnessed the abuse and did nothing. I have no words. No info about her infant baby brother's condition or circumstances. South Milwaukee man, mother accused in death of 4-year-old child: ‘It’s my fault, my fault’ Mom and boyfriend accused of murdering daughter, 4, after she is found covered in bruises and bites | Daily Mail Online A Wisconsin mother and her boyfriend have been charged with the murder of her four-year-old daughter, after the little girl's dead body was found covered in bruises and human bite marks. Autumn Horak was found 'pulseless and not breathing' Friday morning in her home in Montana Avenue, South Milwaukee. Autumn's mom, Christina Collado, 21, and her boyfriend, Jerome Millen, 22, are now accused of causing her death, after the little girl was 'utterly tortured over a period of months' at the hands of Millen, prosecutors said. Police were called to the property at around 7 a.m. on Friday to find the four-year-old unresponsive. Officers said the little girl was wearing only a diaper and was covered in bruises on her jaw, head, forearm, and sternum. She also had 'what appeared to be a human bite mark' and a burn injury. The child's mother told officers she had put Autumn down to sleep on Thursday night, and she was found unresponsive by Millen the next morning. Millen, who is already known to local cops, had fled the scene before officers arrived but was tracked down to a friend's house and arrested, according to police reports. When officers told him Autumn was dead, the suspect allegedly responded: 'so my life is over'. He confessed to repeatedly abusing the little girl, admitting that prolonged, horrific abuse had 'killed' her, the report said. 'If all the injuries caused (the child) to die, it's my fault, my fault,' he said, according to the report. The night before Autumn was found dead, Millen beat her repeatedly, covered her mouth multiple times, and held a pillow over her face to smother her, he admitted to officers. He also reportedly said: 'If she suffocated, that is my responsibility and I killed that child.' An autopsy declared the death a homicide by suffocation, Fox 6 News reported. Collado pinned the blame for her daughter's death on her boyfriend, saying she had seen him physically abuse her many times, including seeing him bite the four-year-old on two separate occasions. She said she saw him slam the little girl's head into the floor the night before she died, the police report said. However, she admitted that if she had protected her daughter she would still be alive, the report said. 'If she properly protected (the child), (the child) would still be alive,' she told officers. Family members also told police the victim had sustained a campaign of physical abuse at the hands of Millen but were too afraid of him to report it, according to WISN 12 News. Millen is charged with physical abuse of a child resulting in death, which carries a maximum penalty of life in prison. Autumn's mother Collado is charged with chronic neglect of a child resulting in death and faces up to 60 years in prison. They appeared in Milwaukee County court on Tuesday.