From Kyle Hopkins and Casey Grove in Anchorage --

An alleged robber and getaway driver are now charged with manslaughter after a homeowner killed their accomplices, police say.

The trouble began Nov. 10, when three people entered a trailer on the 700 block of Muldoon Road, demanding money and drugs, according to police. The man inside shot and killed two of the 19-year-old robbers, police say.

Now the alleged accomplices of the two men shot and killed face charges for both the robbery and the deaths. The robbers believed there was a marijuana grow at the trailer, the indictment says.

Read the charges here.

An Anchorage grand jury on Thursday indicted Brian Albert Pfister, 18, and Ursula Evelyn Roberta Pico, 21, for:

-- Two counts of manslaughter
-- First-degree robbery
-- Conspiracy to commit robbery
-- First-degree burglary

Police say Pfister was the robber who escaped when his partners were killed. Pico drove the getaway car, police say. She also is charged with evidence tampering for trying to hide the vehicle.

The resident who fired the shots, 55-year-old Larry James, has not been charged. A prosecutor said Friday that a police investigation showed James was clearly within his rights under Alaska law in defending himself with deadly force.

Police confirmed they dismantled a marijuana grow operation at James' trailer sometime after the shooting. Prosecutors are still considering charges for James related to the marijuana grow, said Assistant District Attorney James Fayette.

Here's the news release police sent to reporters this morning:

Subject: Grand Jury Indicts Two

An Anchorage grand jury has indicted two people in connection with a home invasion robbery that ended in the death of two people.

On November 10, 2011, a home invasion robbery occurred at the 700 block of Muldoon Road shortly after midnight. Anchorage Police Detectives investigated the robbery and shooting. The investigation disclosed that the robbers burst into the trailer, pistol whipped the resident in the face, and demanded money and drugs. The resident retrieved a handgun, and shot two of the three robbers. The two men died. A third robber ran away. Police identified Pfister as the third robber who escaped, and Pico as the getaway driver.

On Thursday, December 15th, an Anchorage grand jury returned an indictment against Pfister and Pico. The grand jury indicted Pfister and Pico for Manslaughter, Robbery, Conspiracy to Commit Robbery, and Burglary. The grand jury also indicted Pico for Evidence Tampering for trying to hide the getaway car. The grand jury alleged that Pfister and Pico were criminally responsible for the death of their own accomplices because they agreed together to engage in a home invasion robbery, where gunplay and death or serious injury was reasonably foreseeable.

Pfister and Pico will be arraigned on Monday, December 19th, 2011 at the Anchorage Jail court.

This is an ongoing investigation. Police believe that members of the community may have additional information about this event. Citizens are encouraged to contact Detective Dave Cordie at 786-8679.

Note: A criminal charge is merely an accusation of criminal wrongdoing. All persons charged with crimes are presumed innocent until and unless proven guilty by a court of law.