You may make an FOIA request for the release of crime scene photos, but they will not necessarily be released. It really depends on a lot of different factors (including the age of the crime). You do not have an absolute right, in other words, to view them.
The FOIA contains nine exemptions that permit (but do not require) agencies to withhold information. These exemptions are national security, trade secrets, oil and gas well data, internal agency personnel rules and policy matters, information specifically exempt from disclosure by another law, federally regulated bank information, personal privacy, and law enforcement investigations.
The exemptions that would cover crime scene photos would most likely be personal privacy laws and law enforcement investigations. If the photos are from an ongoing investigation, they will probably not be released. In fact, some states do not allow their release at all, to protect the privacy (and often safety) of the victims and their families.