A 14-year-old girl was arrested Sunday, accused of fatally stabbing her 4-year-old cousin, police said.Officers were called to the Beechwood Gardens Apartments in the 2700 block of North Graham Avenue just after 11 p.m. on a report of a child stabbed.They found Leon Thomas III, 4, suffering from multiple stab wounds in a room on the first floor of the apartment.Officers administered CPR until medics arrived."He was limp as he came out, and you also heard the police as the ambulance and people was coming up, you also heard them say, 'It's bad,'" said neighbor Kevivah Parker.The boy was taken to Riley Hospital for Children in critical condition, where he died a short time later.Investigators said they determined the boy's cousin, a 14-year-old girl, may be responsible for the stabbing.The girl was found covered in blood, walking in the 2300 block of Ritter Avenue, police said.Police said they believe the 4-year-old boy and his 11-year-old sister were at their grandparents' apartment, along with their 14-year-old cousin. The grandparents were upstairs at the time of the incident.The 14-year-old was questioned by police overnight and arrested Sunday on a preliminary charge of murder."It certainly is one of those cases that is just a tragedy for the family, and certainly for the first responding officers that had to witness that," said Indianapolis police spokesman Officer Kendale Adams. "The hope is that (the 14-year-old) will get the services they need to become a better person. Obviously, this person needs a lot of social services and professional services." Watch RTV6 and refresh this page for updates.