Senser's husband, teenage daughters, stepdaughter and several experts were among an estimated two dozen people called to the stand.
Experts have testified that it would have been difficult to see Phanthavong or the flashing lights on his car because of the construction, disconnected streetlight and the curving roadway, according to the Minneapolis Star Tribune.
In testimony last week, Senser's stepdaughter, 28-year-old Brittani Senser, said she forced her stepmother to admit her role in the accident.
Brittani Senser testified that she was angry after media reports linked her to the accident, adding that she was concerned because her fiancé knew Phanthavong's brother, and people began to ask her if she was involved in the victim's death, the Star-Tribune also reported.
"I wanted my dad to stand up for me and say I didn't do it," she told jurors, adding, "For people to think I killed someone made me angry."
Amy Senser's defense lawyers countered that Brittani Senser was actually angry that the hit-and-run had caused damage to her career, saying that the 28-year-old was more upset about losing a charity singing gig than about Phanthavong's death.
Senser played four years with the Vikings in the early 1980s before a knee injury ended his career. He co-owns Joe Senser's Restaurant and Sports Theater, a Minneapolis-St. Paul-area restaurant chain, and has worked as a Vikings radio color commentator.
The Associated Press and Laura McCabe contributed to this report.