man walking his dog in Terrell on Wednesday shot and critically wounded an armed 17-year-old robber

man walking his dog in Terrell on Wednesday shot and critically wounded an armed 17-year-old robber, police said.The incident happened at about 10:20 p.m. in Ben Gill Park in the 100 block of Lions Club Lane where, police said, a group of teen robbers surrounded the man.According to investigators, when a boy in the group pulled out a gun, the man, a licensed concealed handgun owner, fired shots.The teen was apparently struck in the head and was listed in critical condition at Parkland Hospital. His weapon was recovered at the scene and later determined to be stolen during a separate offense in Terrell, according to police.Three other teen suspects fled the scene in a vehicle that was recovered in the 300 block of S. Park Street, police said.Police identified the teen gunman and one of the other suspects, and were working to ID the two remaining boys. The robbery victim was not injured.