The Muscogee County School District on Tuesday released information that provides further details about the employee who allegedly was driving a school district pickup truck that killed a pedestrian and sent another to the hospital Saturday.

According to authorities, Alfie Remone Johnson, 45, of Hilyer Drive, was driving a 2012 white Ford F-150 westbound on Steam Mill Road, near Peters Chapel AME Church, at 6:35 a.m. when the vehicle drifted onto the sidewalk and fatally struck Loretta Williams, 50, of Coronet Drive and injured Linda Estell, 63, of Kennedy Street.

Muscogee County School District communications director Valerie Fuller said Johnson has been a part-time security officer for the system since June 14 and was working a scheduled shift from midnight to 8 a.m. at the time of the accident, but his departure point and destination are unclear.

Johnson still is working in the district's security office but not in a "mobile capacity," Fuller said.

Estell was in satisfactory condition Tuesday afternoon at The Medical Center, said hospital spokeswoman Marion Scott.

When the accident happened, Williams and Estell were walking about 2 feet ahead of two other pedestrians, a witness told the Ledger-Enquirer on Monday.

Johnson wasn't injured in the wreck, the accident report says. He didn't return a phone message seeking comment Tuesday.

Columbus police Maj. Julius Graham said Tuesday afternoon that no arrest has been made in the case and it remains under investigation.