CINCINNATI (AP) — A Hamilton County judge Monday set bond at $4 million for a man accused of killing four people in separate double slayings.

Authorities said 42-year-old Alto Miles killed two women and two men within 24 hours last week. Records available Monday didn’t show whether he had an attorney yet. He was arrested Sunday.

Prosecutors said they are still investigating, but could ask a grand jury to add a death penalty specification to murder charges.

Cincinnati police said officers responded to a North Avondale apartment shortly after 5:30 p.m. Friday and found Bridgett Carter, 56, and Tasia Mason, 35, dead.

Early Friday, police said, William Bowen III, 28, and Michael Eves, 47, were gunned down in Avondale.

The Cincinnati Enquirer reported that Miles was on parole after his 2018 release from prison following a two-year sentence for a 2016 conviction of trafficking heroin and cocaine, according to the Ohio Department of Correction and Rehabilitation. He was convicted in 1997 and 2014 of being a felon in possession of weapons, The Enquirer reported.