ST. LOUIS (KMOX) -

St. Louis police have an arrest in that Friday night gunfight at a home repair shop in the 31-hundred block of Ivanhoe near Arsenal on the south side. 

Police say it appears 74-year-old Robert Hartzell had an argument with a 50-year-old man inside the shop, pulled a gun and shot the 50-year-old who staggered out and collapsed nearby. 

 Hartzell then got into his car.

  As he drove away, police say a third man shot Hartzell in the head.  Hartzell died and the third man fled, only to be picked up by police late Saturday.

  The 50-year-old who was critically wounded is hospitalized.

  Neighbors say Hartzell had been in the home repair business for over 50 years.