TYLER, TEXAS (BNO NEWS) – The Tyler Police Department in Texas has issued an Amber Alert for a missing 13-year-old girl who is believed to be in “grave and immediate danger,” officials said on Wednesday.

13-year-old Ericka Faith White was initially reported as a runaway on Saturday after she left her home and did not return. Information later obtained revealed that she is with or was taken by 18-year-old Blake Austin Miller, who is also known as “the Joker.”

Andy Erbaugh, a Major Crimes Detective for the Tyler police department, told BNO News that Miller is usually armed with several knifes and, according to his family, has mental issues. He had no information on what type of mental issues. The victim and the suspect knew each other before Saturday, but it was not immediately clear how they may have met.

Ericka White, born on October 16, 1996, is a white female. She is 5′ 1″ tall weighing about 105 pounds and has blonde hair. White has blue eyes and refuses to answer to her given name. She is also known to people as “Star” or “Stargazer.” She was last seen wearing a black hooded jacket and blue jeans.

The suspect, Blake Austin Miller who was born on October 22nd, 1990, is a while male. He is 5′ 6″ tall weighing about 140 pounds. Miller has brown hair, green eyes and has bad acne.

Law enforcement officials believe the girl is in grave and immediate danger. They were last seen at an IHOP Restaurant at Highway 75 and Spring Valley in Richardson, Texas on Sunday.

Anyone who has information about the location of White and Miller, or has more information about the case, is urged to call the Tyler Police Department immediately at (903) 531-1000. You can also call 911 to report any information about the case.

Austin Miller a.k.a. The Joker