Mr. Conteras was selected to be principal of Madison High School by Mike Miles. According to the Houston Chronicle Madison High School was placed on lockdown Friday afternoon after an uproar around a strict new cell phone policy that school leaders said was necessary to curb fights at the south Houston school. 
Principal Edgar Contreras sent a message to Madison parents Friday afternoon advising them that the “school is currently on lockdown due to concerns over recent fights that have occurred on campus.”

How schools enforce the policy varies. Last year, a video went viral of a student at Lamar High School punching a teacher who tried to take his cell phone away.
“Some students who are angry about this policy have caused disruptions on campus today, prompting the lockdown that is in place,” Contreras said. “We have additional support from the HISD South Division as well as additional officers from HISD Police at our school as we work to keep everyone safe.”