Relative pronoun clarification
Busco a alguien que ...
Busco a alguien quien ...
Are they both correct, or is quien wrong here?
3 Answers
Short answer: Quien is wrong in this case.
Short answer with arbitrary grammar rule attached: Quien is wrong in this case. Quien or quienes are not used as the relative pronoun in restrictive clauses unless they follow a preposition.
Where they got the answer from. quien vs que
More info on relative pronouns: link