Detectives believe they are looking for the abandoned infant's father, who they say frequents the Times Square area.
A woman has been arrested after leaving her son unattended along a road, allowing him to run off in the night following a tantrum and falsely reporting a kidnapping.
The 17-month-old girl died from traumatic injuries believed to have been inflicted by her mother.
Authorities identified an infant girl between seven and nine months old who was abandoned at a store in Lomita, and have also learned the identity of her pregnant mother.
Authorities are asking for the public's help in finding a pregnant woman who they say abandoned a baby at a business in Lomita.
Court paperwork stated that neighbors sounded the alarm, leading deputies to find the children in an apartment unit with scattered leftover food and a urine smell.