This work is dedicated to deeply understanding a quite recent theoretical discovery about new particles that reside in the ( 1 2 , 0) ⊕ (0, 1 2 ) representation space, namely, spin-half bosons, introduced in [1]. We delve into the first principles of the quantum field theory, following Weinberg's approach to causal fields, to bring out the main characteristics carried by all spin-half particles, seeking to connect the Weinberg formalism with a (supposed) evasion of spin-statistics theorem [2]. As we see, the local quantum fields associated with these spin-half bosons cannot be used to represent elementary particles with spin 1/2 in a quantum field theory that satisfies Lorentz symmetry.