The company my ex's father worked for HIGHLY recommended NOT going out in the city after dark. This is a general warning and of course one can venture out, but DON'T go alone and STAY in well lit, main-street areas.
You get off the plane, get your rental car, turn on the radio to listen to some Soca, the news comes on.
Prison officers found with Marijuana on them, Kidnappings, Murder, Corruption charges, and this is daily, no joke, every single day we were there the front page of the guardian had some news on someone getting killed or imprisoned.
Whilst we were at J'ouvert, 11 Brits staying in Maracas bay, not our hotel but a villa nearby, were held at gunpoint and all their valuables stolen to the tune of a couple 10s of thousands of pounds.
The crime rate is high, but its usually intergang, or aimed at targeting businessmen for kidnap and ransom, just screw your head on and stay away from dodgy areas.
Not all Police are good Police here, I'm sorry to say, but again, this is mainly targetted at locals and not tourists.
The people are friendly, I lost my misses during J'ouvert morning, whilst dark, she resurface a few hours later and had been helped by all sorts of people, rastas, gangsters, whoever, as a tourist you can be quite safe, but if you're in a crowd, be prepared for pickpockets and an occassional stampede of people running away from a fight.
Everyone is really friendly in Trindad. The problem with this is that the beggars often take advantage of this.
What I mean is that they start wakling and talking to you, and then when you arrive at your destination they expect payment for walking with you. You just have to learn to politely ignore them, or explain that you are fine walking by yourself.