Atlanta police on Monday filed murder charges against suspects in two previously unsolved slayings, one from five months ago and one that happened six years ago.

Louis Parks, 34, was arrested by Zone 4 officers and charged with shooting a towing company security guard in December, according to police spokeswoman Kim Jones.

Jones said Lyndon Tucker was shot on Dec. 17 while working security at Midtown Towing on Ridge Avenue. He later died at Grady Memorial Hospital.

In the second case, Jones said a murder warrant was secured Monday for Ronald Fisher, charging him with the May 30, 2005, shooting death of Eddie Shaheed.

Shaheed, 17, was shot in the back of the head while walking along Cascade Avenue with a group of friends, Jones said.

The Atlanta police Fugitive Squad served the murder warrant on Fisher at the Fulton County Jail, where he has been held since March 2010 on a separate homicide charge.