If a Muslim did approach the girl and make an indecent proposal he would be in violation of hisown religious code:
172 – Rule: Men are allowed to speak to non-Mahram women as long as the following two conditions are met:
It is not with the intention of lust.
The speaking does not lead either one of them to commit a sin.
Note and warning: Sometimes, it can be seen that in the hearts of men, the devil has become so firm that many of their social gatherings are doubtful, and it can be seen that a man has more interest in mingling with non-Mahram women than with his own Maharim. For example, there is a situation in which he can ask something from a man, but instead, he asks a non-Mahram woman; sometimes his conversation with non-Mahram women is prolonged so as to be able to talk with them more; going to places of amusement and on vacations with non-Mahram women is more attracting to him; if there is a place where there are non-Mahram women, he desires to be there more than other places; and when guests come over, he tries to talk and socialize more with the non-Mahram women than the men. He likes to stay in the presence of non-Mahram women more so than anywhere else. In summary, he likes any action that non-Mahram women are participating in more than any other work.
@Al-Islam.org
Either he was unaware of this moral restriction or forgot about it 'in the heat of the moment'.
Since the girl hasn't made any statement on the matter we remain ignorant of the facts of this matter and i'll remind anyone prepared to place blame either way that the murder of Emmitt Till in 1955 was committed upon the word of a white woman who, many years later, admitted she wasn't sure it was him.