Don't worry, it was probably drug related and besides, the Marina area is 3 miles from San Pedro so nothing to worry about.
These things happen all over the world, San Pedro is no different. Nowhere is perfect.

Except that at the present pace San Pedro's murder rate for 2015 will be 4.5 times that of Chicago, USA and 17.5 times that of London, England.

Except that many folk who live on the island remember when this sort of thing NEVER used to happen and now it's happening more than once a month.

Except that the Belize government seems to be adopting a policy whereby the San Pedro police have just enough resources and support to be totally ineffective.

Nothing to worry about.

Ticking, ticking, ticking.....