PHILADELPHIA (CBS) – Murder charges were filed against the 21-year-old man arrested for the fatal shooting outside Lincoln High School on Monday. Aaron Scott was arraigned Tuesday night and has a court date next month.

A 16-year-old student has also been taken into police custody.

READ MORE: FDA clears booster doses of Moderna and Johnson & Johnson vaccines, says Mix And Match OK

The shooting killed Jeffrey Carter, 66, a passing grandfather when he was shot. A 16-year-old Lincoln High student is still in critical condition.

Including Monday’s shooting, there have been four episodes of gun violence this school year near schools in Philadelphia. This is a trend that worries many.

In North Philadelphia, the principals union, city council and parents are holding a press conference amid this spike in violence.

There are also students here from a nearby after-school program. They are asking that more be done to ensure the safety of students.

“Children should be safe in the school building. They should feel safe going to school and coming home from school, ”said parent Maritza Guridy.

Guridy has four children in the Philadelphia School District. She is also part of the National Union of Parents and the regional organizer of the northeast. As city and school officials try to curb the rise in violence, she says parents need to be seated at the table.

READ MORE: Philadelphia water workers charged with shooting in South Philadelphia crash

“They need to ask parents, ‘What do you think your school needs to make it safer? Conversations do not take place with families. We know what is happening on the streets because our children walk these streets every day, ”she said.

“We should ensure the safety of young people,” said Helen Gym, member of the city council.

Gym backed the principals’ union on Wednesday and, among other things, called on the school district to fill the 600 vacant positions it has. Some of the positions include counselors, nurses and security personnel.

She also calls for the expansion of safe zones in schools and more after-school programs.

“It’s not just up to the district to solve this problem, it’s not just up to school principals to take care of it on their own. This is not a problem that can be solved only by the police. We need a large scale investment in young people both inside and outside of schools, ”Gym said.

Principals say the crime these students face doesn’t have to be like this.

“There is a war on these streets of Philadelphia and it is because the system may have failed many of our babies who lack self-knowledge, who lack love, who lack resources, who lack resources. ‘access and who don’t have the ability to dream,’ said Shavonne McMillan.

NO MORE NEWS: White House presents plan to vaccinate children between 5 and 11 years old once COVID-19 vaccine cleared by federal regulators

At the city’s press conference on crime on Wednesday, Mayor Jim Kenney announced that there will be more emphasis on school perimeters in the future so families can have peace of mind.