Richard J. wrote:

This could be easily cleared up by releasing any surveillance photos
that were taken. Odd that none were released of Menezes yet.

Not odd at all. If a murder or manslaughter charge is made, as the
title of this thread suggests, any surveillance photos would be vital
evidence, and should be presented at the trial, not before.
--

Well now it seems there may be more sinister reasons for not releasing
the pictures (if they exist or existed). According to the Guardian:

"Evidence of this hold-up should have been provided by CCTV footage
from dozens of cameras covering the Stockwell ticket hall, escalators,
platforms and train carriages.

"However, police now say most of the cameras were not working. Yet
pictures are available of a bombing suspect leaving another station
nearby, and after the 7 July attacks tube boses could have been
expected to make extra efforts to see that all their cameras were in
action.

"The questions are mounting. Initial claims that de Menezes was
targeted because he was wearing a bulky coat, refused to stop when
challenged and then vaulted the ticket barriers have all turned out to
be false. He was wearing a denim jacket, used a standard Oyster
electronic card to get into the station and simply walked towards the
platform unchallenged."