(At 7:44) The CSU tech that is standing up can be heard saying "Hear that? Get the tub and the sink" to his colleague, but his mouth does not move.
2 minutes and 20 seconds into the episode, a boom mic operator's reflection is visible in the television screen.
At about 19 minutes 40 seconds in, when Elliot and Detective Hawkins have just left the mother's house, you can see the shadow of a boom mic on Elliot's shoulder.
When Elliot is talking with the detective after leaving the suspect's apartment, a boom mic cover shadow is seen on Elliot's shoulder.
Between 6:50 and 7:10 when Benson is talking to ME Examiner in the bedroom the crew, camera and boom mic are reflected in the TV screen.