The day Andrea Curry-Demus met Kia Johnson -- the 18-year-old pregnant girl who would later end up dead in her Wilkinsburg apartment -- both women were visiting male inmates at the Allegheny County Jail, according to police.

Yet, under the jail's own regulations, Ms. Curry-Demus should have been prohibited from visiting anyone at the jail because she had been a prisoner there herself just seven months before.

The jail doesn't allow former inmates to meet with current inmates until they've been out for at least a year, Warden Ramon Rustin said.

Correction officers, however, don't run background checks on every visitor, he said, and some visitors lie about how recently they served time.

Ms. Curry-Demus was incarcerated from Nov. 11 to Dec. 3, after being arrested for shoplifting.

County jail visitation logs show that, on July 15, she saw her husband, Raymond Demus, from 11 a.m. to noon, according to a criminal complaint. Ms. Johnson visited her boyfriend from 12:45 p.m. to 1:45 p.m. the same day.

Surveillance cameras caught footage of Ms. Curry-Demus and Ms. Johnson talking for several minutes around 12:18 p.m.

Police found Ms. Johnson's body in Ms. Curry-Demus' apartment four days later.