Get Javascript object using value

I have an object like :

Employee = { 
  0 : {"ID": 100, "Name": "ABC", "Level": 2},
  1 : {"ID": 101, "Name": "EFG", "Level": 3},
  2 : {"ID": 103, "Name": "KLM", "Level": 3}
}

I need the whole Employee[1] : {"ID": 101, "Name": "EFG", "Level": 3} and I have the value 101. How do I get this ?

Thanks in advance

Source: AngularJS