The dwindling staff at Baltimore's Police Department is dangerously low, according to national police experts.

In Baltimore's Southern Police District on Tuesday, sources say at one point, there were as few as three police officers patrolling a district of more than 61,000 residents.

At several points, radio transmissions called for volunteers to work overtime.

The department is being forced to postpone training for some officers in order to keep them on the streets.... Read More: FOX45