One of my readers had this sage advice for anyone considering an armed guard:
Before hiring an armed guard, ask to view the guard's resume. Having worked as an armed guard I can say from experience that levels of training and skill vary greatly. Fully half of the armed guards I have worked with fire their weapons once every two years to qualify, this is simply not enough. Try to find a guard that takes weapons and use of force training seriously by taking classes both in the tactical employment of weapons at his disposal and more importantly the correct time to use force.