The bodies of April, 21, her mother, Cynthia Serrano, 48, and her aunt, Kathy DeLeon, 35, were discovered Tuesday morning at a house on West Felix Street.
McGinnis, 22, posted about the deaths on his Facebook page, and used hashtags to express love for April and her family.
He voluntarily came to the police station late Tuesday, but he did not confess -- yet.
“We took him back to a location," Sgt. Joe Loughman said. "We were about to leave and we saw some things that … we were interested in. We asked Mr. McGinnis if he would come back and talk with us a second time."
This time, Loughman said, McGinnis admitted to the slayings.
-- Bill Miller