Gwinnett Daily Post

LAWRENCEVILLE - A former Grayson High School teacher and coach was indicted this week on charges he sexually assaulted a female student.

The student alleges Marc Lancaster, 23, locked her in a classroom trailer and sexually assaulted her on Dec. 18 last year.

Lancaster was indicted on two counts of sexual battery and a single count of sexual assault against a person in custody. His arraignment is expected within a month.

Lancaster was hired at the beginning of the 2007-08 school year as a social studies teacher. The indictment alleges he touched the girl, who was his student, on her breasts and groin against her will.

Lancaster resigned Dec. 19 after the school district launched an investigation into the alleged assault, a school spokesperson said. He was arrested on Dec. 21 and released the same day on $18,900 bond.

Lancaster also coached Grayson's junior varsity football team and freshman baseball team, according to the school. He is married with a young son.

In other indictments handed down this week a Gwinnett grand jury indicted a 26-year-old man police believe stabbed and killed a Norcross man in a gang-related incident outside an apartment in January.

Jose Luis Martinez-Macias faces a felony murder charge and one count of aggravated assault in connection with a Jan. 9 incident in which he and Marvin Talavera, the victim, exchanged hand gesture gang signs outside the Oakbrook Pointe complex in the 1600 block of Pirkle Road.

Talavera, 18, was stabbed multiple times and later died at the hospital. Police said the weapon used in the stabbing was found at Martinez-Macias' home.

Authorities determined Talavera was a member of the North Side 18th Street gang. Martinez-Macias denied having any affiliation with a gang.

Staff Writer Alex Joyner contributed to this report.