An 18-year-old Baton Rouge man accused in the slayings of six people over a 14-month span will be tried first in the 2009 killing of rapper Chris “Nussie’’ Jackson, the East Baton Rouge Parish district attorney said Friday.

Michael “Marlo Mike’’ Louding is charged with five counts of first-degree murder, one count of second-degree murder and two counts of attempted first-degree murder.

Jackson, an up-and-coming rapper known professionally as Nussie, died Feb. 9, 2009, after being shot in the head at a house at 2317 America St. He was 33.

Jackson, who founded the record label Dope Celebrity Family in 2004, regularly took the stage with other local rappers at clubs around Baton Rouge and south Louisiana, friends said at the time of his death.

He recorded three albums, including “The Champ Iz Here’’ in 2008, and was on the cusp of larger fame, those friends said.

Louding is charged with first-degree murder in the deaths of Jackson; Marcus Thomas on April 25, 2009; Terry Boyd on Oct. 21, 2009; and Charles Matthews and Darryl “Bleek’’ Milton on April 1, 2010.

Nationally acclaimed Baton Rouge rapper Torrence “Lil Boosie’’ Hatch also is charged with first-degree murder in Boyd’s slaying. Prosecutors called it a murder-for-hire.

Prosecutor Dana Cummings has said previously in court that Hatch is accused of hiring Louding to kill Boyd.

Louding also is charged with second-degree murder in the killing of Michael Smith on Dec. 18, 2009.

There are no trial dates set in any of those cases.

Moore said Friday it is too early to say whether Louding will be tried in all of the killings in which he is charged.

“We’re just going to make that decision once that trial is over,’’ he said, referring to the case involving Jackson.

State District Judge Don Johnson is scheduled to hold a hearing in that case July 20.

Louding appeared Thursday before state District Judge Richard Anderson in the case involving Thomas, and Cummings announced in court that the state is ready to pick up the pace.

“We’re going to start moving our cases ? and prosecute them as quickly as possible,’’ she told Anderson and Louding’s attorney, Margaret Lagattuta.

Lagattuta responded by saying she intends to file a motion seeking to suppress the five hours of statements Louding gave police.

Louding, who is being held without bond, was 16 at the time of Jackson’s and Thomas’ deaths and is not eligible for the death penalty.

First-degree murder is punishable in Louisiana by either death by lethal injection or life in prison, but the U.S. Supreme Court has barred the execution of juveniles.

Adrian Pittman, 36, of Baton Rouge, also is charged with first-degree murder in Boyd’s killing.

Boyd, 35, was shot through a window while inside his home at 16837 Vermilion Drive.

Kendrick Johnson, 19; Johnathan Rogers, 17; Ryan “Sneaks’’ Carroll, 16; and Reginald Youngblood, 32, all of Baton Rouge, each are charged with two counts of first-degree murder in the slayings of Matthews and Milton.

Jared Williams, 20, of Baton Rouge, is charged with first-degree murder in Thomas’ death.