A Mississippi mom's tweet about her son landed her in a human trafficking investigation.[br /][br /]Alex McDaniel posted a message on Twitter saying her 3-year-old son was for sale for $12 or best offer.[br /][Ads /][br /][twitter ID="911044418458841088[br /]" /]She said she meant the tweet as a joke, but someone saw it and reported it to a child abuse hotline.[br /][br /]McDaniel said a Child Protective Services worker dropped by her office and demanded to see the child.[br /][Ads /][br /]The investigation was eventually dropped.[br /][br /]McDaniel said she wants her story to be used as a warning to be careful about what you post online.