that it's not clear what prompted the shooting.

His father described him as a fierce boxer who could throw big punches, but had an even bigger heart.

"He had that dual personality," he said. "In the ring he was mean and vicious and outside he was just passionate and loving and always smiling and always laughing."

Muhammad had a successful amateur career with an overall record of 89-9. He earned a spot as an alternate with the 2008 U.S. Olympic team.

He debuted as a professional that same year in the bantamweight division, for fighters weighing less than 118 pounds. He won all eight of his fights between 2008 and 2012, with seven knockouts.

But Muhammad hadn't fought in the six years since, after a run-in with the law slowed his career.

In 2012,he was accused of striking a man and pulling him from a vehicle, which was, in part, blamed for slowing his career. He eventually pleaded guilty to third-degree unlawful taking.

Around 2015, he moved to Las Vegas to train at Mayweather Boxing Club. He was preparing to fight again between October and December, his father said.

Muhammad leaves behind 12 siblings, as well as a young daughter born in February, named Corinthian Sophia Grace Clark, his father said. He is Abdur Rahim Muhammad's oldest son.

"Every picture that we took with the family, you always see him with one of the babies in his arms," he said. "I always loved that about him."

Even in the ring, Muhammad's father said his son had a compassionate side.

During Muhammad's first professional fight, his father