KANSAS CITY, Mo. -- Authorities have canceled an Amber Alert for a missing 4-year-old girl whose mother was found slain in their apartment on Friday morning.

Investigators will continue to search for Allyson Corrales and her biological father, Luis F. Corrales, 31, according to a news release from the Kansas City, Mo., Police Department.

The alert was lifted after 24 hours, but it does not affect the ongoing investigation, said Kansas City police Capt. Rich Lockhart.

Police described Luis Corrales as a person of interest in the "homicide/abduction investigation," according to the news release.

Corrales may have relatives in Houston and Manassa, Va., according to the news release.

He had been working in San Antonio but came back to Kansas City to visit his daughter on Sunday, police said.

Though police hadn't yet released the identity of Allyson Corrales' mother, her family said she was Katia Lainez, 27.

Lainez' brother-in-law, Orlando Melgar, went to her apartment in the 4000 block of Harvard Circle on Friday morning to check on her because her sister, Lelis Melgar, hadn't heard from her since Wednesday night.

The apartment management let him into her unit, and he found her dead inside.

Orlando Melgar didn't see any obvious wounds on her body, he said.

"I didn't see blood or anything too," Orlando Melgar said. "I don't know how. I don't know how."

Lelis Melgar said she was feeling pain for her sister but also was worried about her niece. In Spanish, she urged anyone who saw her to call 911.

Lainez had a restraining order against Luis Corrales and she had sole custody of Allyson Corrales, according to investigators. Lainez's family said Lainez feared Luis Corrales and that he was a very jealous person.

If you have information about where to find Allyson Corrales or her father, please call the Crime Stoppers TIPS Hot Line at 816-474-TIPS (8477), text TIP452 plus a message to CRIMES (274637) or submit a tip online at kccrimestoppers.com.