“He hit me three times before I started shooting back,” Ottie Sides testified.
He also said that his wife did not fire her gun during the incident.
Sides said that he retreated and grabbed a loaded 9 mm handgun, but collapsed in the office when he was trying to call for help.
Strickland's defense attorneys said that it was Strickland who later phoned 911.
Investigators said in May that Strickland was struck by several of the bullets but that none penetrated the ballistic vest he reportedly was wearing during the gunfire exchange.
Oklahoma County sheriff's Sgt. Mike Cunningham testified Wednesday that Strickland was wearing what he called a military-style ballistic vest under his shirt and a pair of kneepads underneath his jeans.
Strickland was denied bail. His next court date is Sept. 18.