( CNN ) -- The mother of a 4-year-old girl snatched from the front yard of her small-town Missouri home tried to chase after her daughter 's abductor , a neighbor said Tuesday . Alisa Maier was kidnapped Monday evening in Louisiana , Missouri , while she was playing with her brother , police there said . Appearing at a news conference Tuesday morning , grandfather Roy Harrison told reporters , `` I want this baby back . '' `` Please , anybody , if you know anything , call this guy back here , '' he said , pointing to Louisiana Police Chief Richard Hughes . `` Call the FBI . Call whoever you need to call . '' Anita McKlevis , who lives across the street from the family , said Alisa 's mother was `` just beside herself '' and tried to pursue the man who abducted the girl . `` She jumped up and went across the street , got into her van and took off , '' McKlevis told HLN 's `` Issues with Jane Velez-Mitchell . '' She said the children were regularly supervised by parents or grandparents while playing outside : `` I never seen this little girl without her parents , '' McKlevis added . Louisiana is about 80 miles north of St. Louis . Michael Kaste , an agent from the FBI 's St. Louis office , said between 75 and 100 law enforcement officers -- including about 30 FBI agents -- and about 50 volunteers were taking part in the search . Investigators are also questioning known sex offenders about the girl 's abduction , he said . `` We 're going to interview anybody we think could be involved in this , '' Kaste said . Alisa was wearing a white T-shirt and denim shorts when she was taken . Hughes said investigators in Louisiana , about 80 miles north of St. Louis , have no indication that her kidnapping was anything other than a random abduction . Police are examining surveillance video from local businesses in hopes of finding some sign of the abductor , a man of indeterminate age who drove off in a dark-colored sedan with front-end damage , Hughes said . The town of about 4,000 is located just across the Mississippi River from Illinois , where state and county authorities are also involved in the search , he said . `` Ultimately , our goal is to bring her back here to her family , '' Hughes said . Harrison called her `` a really good girl , always smiling , happy-go-lucky . We really appreciate everybody getting together to try to help us find her . ''
Alisa Maier was taken while in her front yard , playing with her brother . Grandfather : `` I want this baby back '' Neighbor says mom tried to pursue abductor . Search area extends into neighboring parts of Illinois .