In court Mark Dorch, 38, apologized to her family who says they say they have no choice but to accept it.
Dorch was sentenced to 30-60 years in prison Friday, convicted of murdering Spears and injuring five others.
Detroit police say Dorch approached Spears, 27, inside the Joe Louis Post on Detroit's east side last October. He asked for her number, but he became angry after her family says Spears rejected him.
"What did Mary do to this young man, nothing," said Belinda Bailey, Spears' aunt. "Only because she did not want to give him the time of day. That was her right."
And as she was leaving the hall, police say Dorch, outside, pulled out a gun and shot Spears, her fiancée and four other people. But Spears, who was shot several times including twice in the head, died.
Dorch's attorney continues to argue that Dorch should never have been charged with murder - only voluntary manslaughter at the most. He also says Dorch has been remorseful since it happened.
"I deeply apologize for what happened that night, it wasn't my intention to go looking for trouble," Dorch said in court.
"He shot another one of my children and two of my girls had to witness their cousin dying in front of them," Gloria Spears said.
Spears' family says her three boys, ages 10, 6 and 2, still ask what happened to their mommy.
"I can't imagine, she was so close to her children," Bailey said.
The mother of Mary Spears says she's unable to look into his eyes
"I miss her, more than this whole world will ever know," said Gloria Spears. "But I know she's with God."
But the family of Mary Spears who they describe as a hard-working, loving mother says they don't believe he is remorseful and miss their daughter every day.
"I have to forgive him," Bailey said. "Lord, my savior is all I have."