Mangalore is a very safe city and women need not have any fear going out alone late at night. There are times when I go for a drive late at night when I am unable to sleep and I see the police doing their rounds and at times they stop me and ask where I am from and then ask me to drive on. The crime we normally have is communal violence which has now considerably reduced . What do you think of your own city , is it safe at night ?
Given below are the various statistics of Mangalore and a safety index
https://www.numbeo.com/crime/in/Mangalore