| MadSci Network: Other |
A similar scenerio occurs in the movie "Presumed Innocent" with Harrison Ford. You may want to check it out. Before I answer the technical question, let me comment from a legal perspective that it may not matter if condom use can be detected. Presence of a condom does not automatically imply concensual intercourse. Some rapists do use condoms. Something to keep in mind. Anyway regarding your actual question. Some condoms contain spermicidal jellies. I believe these spermicidal agents could be detected, but to my knowledge, they are not routinely checked for. One would have to have a suspicion that something was weird in order to ask for that testing. If there were no spermicidal agents present in the condom, I don't know of any way to tell that the sperm came from a condom. Depending on the time-frame that the woman waited, the sperm would probably be dead even if there were not spermicidal agents present in the condom. This might seem a little bit odd if she was axamined immediately after the said incident, but there are physiological reasons for dead sperm. This is termed a "hostile environment". Which means that the woman's vaginal secretions are not optimal for the sperm.
Try the links in the MadSci Library for more information on Other.