Reptilians mimic the original person perfectly in terms of general physical traits, voice and behaviour, but there are some things they can't hide, which are visible to anyone even if you can't see their green glowing energy and the scales.

At this angle here, the pointy jaw and "biting" expression of the police lady; this is a reptilian trait which will shine through at split second occasions. The guy is still himself, try comparing their energy signature, he's probably mostly pleiadan.