A Mason City man has been arrested for giving his teenage son steroids to motivate him about sports.

Todd Gerleman was charged with distributing a controlled substance to a minor.

Authorities say the investigation began after Gerleman's 14-year-old son assaulted his mother at her Gilbertville home on Nov. 19. Officers who responded to the home found a syringe and 105 pills in the boy's bedroom.

Court records show that boy told investigators his father gave him the pills during an earlier weekend visitation. The records also show that Gerleman admitted to giving his son the needle and the pills.

A test at the Iowa Division of Criminal Investigation showed the pills were an anabolic steroid.