Police identified Kirk Bills as Gloria Lee's accomplice in the Jan. 27 fire. The office of the Clark County district attorney confirmed there is a warrant for his arrest.
The fire did significant damage, but all of the puppies were rescued.
Employees of the pet store said Bills had visited several times with Lee.
Three days prior to the fire, Bills fought in California, according to West Coast Boxing. He lost early on.
According to Lee's arrest report, Bills poured gasoline throughout the puppy store, including the kennels.
"We're pretty upset about it in our family because we are big-time dog lovers. We would die if something happened to our dogs. Just hearing that on the news appalled us," said Raul Villareal, who lived near Bills.
Villareal said Bills was married with children. According to a real estate agent, Bills and his family were evicted months ago. Villareal said police frequently came to Bills' home because of domestic disputes.
"There was just always violence over there. Violence carries on to somewhere else. People are desperate, times are hard, people are doing whatever to get money, you know," Villareal said.
According to Bills' Facebook page, the Chicago native is a fighter for Super Judah Productions, run by Zab Judah.
Employees of the pet store believe Lee met Bills through Judah.
"You did the crime, do the time. That's pretty much how it is," Villareal said.
FOX5 reached out to Judah and his promoter on Thursday, but our calls were not immediately returned.
Lee is due in court on Friday for a bail hearing. A judge earlier this week ordered her to house arrest.
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Wednesday, August 27 2014 7:48 PM EDT2014-08-27 23:48:57 GMT
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