HOUSTON, Texas (KTRK) -- Police are investigating after a woman was found dead in southeast Houston Saturday morning.The Houston Police Department responded to the 900 block of Elton Street around 7:40 a.m., and found a woman stabbed to death on the floor.Investigators told Eyewitness News that a social media post alerted the suspect's friend that something was wrong."He has a friend who received a Snapchat message from the suspect saying, 'I've done something wrong. I'm sorry.' And he was covered in blood," a Houston police officer told ABC13.The friend attempted to check on his friend, who lives in his parent's garage, but no one answered.The suspect's elderly parents woke up and found a woman covered in blood on their floor.Investigators say the man was sitting on the edge of a bed with a knife in his hand.After several commands to drop the weapon, the man was tased and transported to the hospital in stable condition.