GREENVILLE (CBSDFW.COM)Just one day after a dead body was positively identified as that of a missing Greenville teenager, officials in the school district issued an alert about a suspicious person near a campus, but later determined it was a false alarm.

Greenville ISD officials alerted parents about a situation involving a middle school student on Wednesday. School leaders said the incident happened at Greenville Middle School when a man allegedly approached a young girl.

The child said the man had been waiting in front of the school as though he was picking up a child. The man allegedly drove a gray or silver Dodge 4-door pickup the girl, lowered the window, asked if she needed a ride and offered to take her home. The student said she refused the ride and the person drove away.

Greenville police and school officials later examined video surveillance of the alleged incident and determined the “suspicious person” was actually a parent who mistook the student standing outside for a friend of his grandchild. The man said he was concerned that the child had not yet been picked up by an adult. The entire situation was a case of mistaken identity.

Despite the error Greenville police said, “Although this proved to be an innocent situation, we still request that students, parents and guardians remain watchful of their surroundings.”

Parents and students are being asked to be extra cautious after Greenville High School student Alicia Moore disappeared after getting off the school bus in her neighborhood. The 16-year-old girl’s body was found days later, some 50 miles away in Van Zandt County.

Alicia’s family has expressed frustration with police, claiming they didn’t begin a “serious” investigation until Monday, despite the fact they filed a missing person’s report on Friday.