Thank a cop Friday, several law enforcement and citizens’ groups say.

In the wake of mounting scrutiny of police across the country after high-profile, police-involved shootings, several organizations have united to promote National Law Enforcement Appreciation Day on Friday.

"In light of recent negativity directed toward law enforcement nationally, there is a need to show law enforcement officers that our citizens recognize the difficult and sometimes impossible career they have chosen, in public service to us all," according to a statement on the Web site for Concerns of Police Survivors, Inc. (COPS), which partnered with other groups to help push for the event.

In 2014, 126 officers were killed in the line of duty, including Mendota Heights Police officer Scott Patrick, according to the Minnesota Chiefs of Police Association (MPCA).

“Few professions carry such risks as law enforcement,” said MPCA Executive Director Andy Skoogman, in a statement. “We believe it’s important to show the brave men and women of law enforcement that we are grateful for their willingness to risk their lives to protect ours.”

More than 50,000 officers are assaulted and more than 15,000 injured in the line of duty each year.

"Several recent tragic incidents nationwide, notably in Ferguson, Mo., and New York City, have resulted in increased scrutiny and criticism of law enforcement’s community relations and tactics. However, the MCPA hopes today is [a] day where Minnesotans remember the great work that police officers do everyday in a very difficult, stressful and challenging profession," according to the release.

People who want to show support for law enforcement Friday are being asked to change their profile picture on social media to this and share a positive story about law enforcement, wear blue clothing, shine a blue light in their house or just simply thank an officer.