The main problem is firearms. The gangs have better weapons than the police.
Then there's a problem with training. One of the things no one says is that many Haitians have left the country, including many police officers from our special forces. In some instances, those forces have been trained or funded by Canada. So their departure leaves a void.
One of the things that people very rarely say, but that everybody thinks, is that when a country has a high or increased level of violence, that means the security forces in place are involved to some degree. That's been proven elsewhere, and Haiti is no exception to the rule.
We talk about economic and political interests, and you can understand that the established forces want to protect those interests. That's why international cooperation is important. However, I'm not sure another force can come in and do the work of the police. I'm also not sure that's what the government is requesting.
In any case, the international community's support will be needed, if only to assist the police force. This is both a security problem and a political and economic problem.
Haiti won't be able to cope without the international community's help.