Are They Both Correct?
'Somebody' is a singular indefinite pronoun. But can it be used in plural form? Does it mean the same thing? Let's see.
Somebody vs. Somebodies
'Somebody' as an indefinite pronoun means an unspecified person.
'Somebody' as a noun means a famous, renowned person, someone who is a celebrity.
Only when 'somebody' is used as a noun, it can be used in plural form. Otherwise, when we want to refer to a group of unspecified people, we should use 'some people', NOT 'somebodies' as an indefinite pronoun.
This is the plural form of the sentence 'somebody was shot at the crime scene.'