Gunman who 'shot dead two maternity ward nurse at Dallas hospital

Man who killed two maternity ward nurses in a shooting near the delivery rooms  

Police said they detained Nestor Hernandez, 30 

Police officer shot and wounded him at Methodist Dallas Medical Center.  

At the time of the shooting he was on parole for aggravated robbery 

He was wearing an active GPS ankle monitor, police said.  

Hernandez was taken to another local hospital for treatment, 

'Our entire organization is grieving this unimaginable tragedy.  Hospital