( CNN ) -- In the final weeks of his brief life , little Myls Dobson suffered unspeakable acts of neglect and violence . A New York criminal complaint released Friday at the arraignment of Kryzie King , 27 , with whom the 4-year-old had been staying since mid-December , said the boy had burn marks and abrasions on his head , neck , face and testicles . There were bruises and numerous marks made by an object on his abdomen and legs and wrists -- bruises consistent with being restrained -- lacerations to his fingers , abrasions to his armpit , and bruises and scars on his back . The child appeared malnourished , the complaint said . Myls suffered `` horrific injuries sustained over a period of days , '' New York Police Commissioner William Bratton told reporters . King pleaded not guilty at her arraignment in Manhattan criminal court on charges of first-degree assault , first-degree reckless endangerment , endangering the welfare of a child and unlawful imprisonment . But Assistant District Attorney Nicole Blumberg told the court Friday that King also was being investigated on suspicion of murder , and likely faced additional charges upon the completion of the autopsy . In a statement , King 's attorney , Bryan Konoski , said : `` My client is not charged with homicide at this time and she is presumed to be innocent of allegations against her . I would tell everyone not jump to any conclusions at this time . '' Shortly before 11 a.m. on Wednesday , police responding to a 911 call found Myles locked in a bathroom at King 's apartment at The Ritz Plaza , a luxury highrise in the Hell 's Kitchen section of Manhattan . He appeared battered , was unconscious and unresponsive on the floor , authorities said . The child was pronounced dead at St. Luke 's Hospital at 1:52 p.m. King told police that Myls ' father dropped the child off for her to watch on December 17 and that she was the `` child 's primary and sole caretaker '' until the time of his death , the complaint said . The father was arrested in December for alleged bank fraud , according to CNN affiliate WCBS . At a news conference Friday , an adviser to the boy 's mother , Ashlee Dobson , said that she lost custody of her son for financial reasons . The mother and the adviser , Tony Herbert , demanded answers from child welfare authorities . `` The city of New York put the child in the care of the father , who they knew was a felon , '' Herbert said . `` You open up a case and then you close it thinking everything is fine ? No . That has to be answered . Who did that , who authorized that ? '' A call placed to the city Administration for Children 's Services was not returned . Dobson lost custody in 2012 , according to CNN affiliate WCBS . `` She was in a shelter , they did n't think it best that she would be in that shelter with a baby , so they gave him to the father , '' Herbert said of child welfare authorities . Dobson told reporters Friday that she was turning her life around in hopes of regaining custody of her son . She had weekly visitation rights but last saw her son in November . In tears , Ashlee Dobson said , `` I love my son . He always loved me . He always gave me kisses . '' The complaint portrays the finals weeks of Myls ' life as a living hell . King told police that on December 29 she removed a hot rack from an oven with a glove and allegedly placed it against the boy 's right leg , leaving linear burn marks , the complaint said . The next day , she told police , she allegedly struck him about his body five to six times with a belt , leaving bruises and scars . The complaint said King admitted that from December 30 to January 4 she allegedly tied the boy 's wrists and feet together with shoe laces and gagged him with a piece of cloth . She told police that resulted in scaring on his wrists and ankles . On the day she freed him , the complaint said , King allegedly beat him twelve to thirteen times with a belt . On Tuesday , during subfreezing temperatures , King told police she allegedly locked the the child , wearing only a T-shirt and shorts , outside on a balcony from 20 minutes to an hour , the complaint said . That same day , she allegedly locked the boy inside a dark bathroom for about three hours . King told authorities that the boy was `` being very difficult eating and that the last full meal he ate was on December 26 , 2013 ; after that he would only pick at his food , '' the complaint said . The last time the boy ate or drank anything was on January 3 . Aside from her comments about the child not eating well , King gave no indication in the complaint of what might have prompted her purported actions . Since arriving at King 's home on December 17 , the complaint said , Myls Dobson lost 20 to 25 pounds . Julie Bolcer , a spokeswoman for the city medical examiner 's office , said an autopsy was performed Thursday but the cause of death is pending further study . CNN 's Julia Talanova contributed to this report .
Four-year-old Myls Dobson was burned and beaten to death . Police commissioner says the child suffered `` Horrific injuries sustained over a period of days '' Caretaker is charged with assault and unlawful imprisonment . Score: 6