Sandy Cullen:

An armed altercation Friday outside West High School involving known and suspected members of two street gangs involved in an April homicide heightened concerns of possible retaliation, police and school officials said Tuesday.
Sgt. Amy Schwartz, who leads the Madison Police Department’s Crime Prevention Gang Unit, said it is not known if members of the South Side Carnales gang went to the high school looking for members of the rival Clanton 14, or C-14 gang.
But staff at West and the city’s three other main high schools and two middle schools were told Tuesday to determine if safety plans are needed for any students who might be at risk, said Luis Yudice, security coordinator for the Madison School District.
Police have not notified the School District of a specific threat against any student, Yudice said.
But authorities have been concerned about possible retaliation since the April 28 shooting death of Antonio Perez, 19, who police say founded Madison’s C-14 gang several years ago while he was a high school student. Five people, who police say are associated with the South Side Carnales and MS-13 gangs, are charged in Perez’s slaying. Two of them remain at large.

Related: Gangs & School Violence Forum audio / video.
A kind reader noted this quote from the article:

“But authorities have been concerned about possible retaliation since the April 28 shooting death of Antonio Perez, 19, who police say founded Madison’s C-14 gang several years ago while he was a high school student.”

Much more here.