AUBURN — A Lewiston woman was sentenced to serve four years in prison for her role in a 2013 Lewiston home invasion in which two women posed as city workers conducting a survey in an effort to gain entry into the victims’ apartment.

Laura Mae Thenor, 29, of 6 Libby Ave., pleaded guilty to robbery, burglary and theft, all felonies. In an agreement with prosecutors, she received a 10-year sentence with six years suspended. When she is released from prison, she’ll remain on probation for three years.

Thenor will be prohibited from having any contact with the two victims as well as four others charged in the invasion.

Prosecutors said Thenor planned the robbery by hatching a scheme to pose as survey takers for the city and coordinated getting one of the firearms used in the robbery. Thenor remained in the vehicle as driver for her four co-defendants, who carried out the robbery at an apartment at 62 Shawmut St. Thenor acted as lookout and texted an accomplice that one of the victims was about to arrive at the apartment, Androscoggin County District Attorney Andrew Robinson said.

Police wrote in an affidavit that one of the victims had been at home on the afternoon of Dec. 5, 2013, when he heard a knock on his apartment door. He had been holding his girlfriend’s infant son.

Two women at the door said they were from the city of Lewiston and were conducting a survey. He told them he wasn’t interested, but they continued knocking, so he put the baby on the couch and opened the door partially because he works part-time with city employees at City Hall.

A man standing behind the women to the side pointed a gun at the victim and forced his way into the apartment. The victim grabbed the gun to wrest it from the man, but a second man with a gun struck him on the back of the head with it, forcing him to the floor, according to the affidavit.

The two men wore bandannas over the lower part of their faces, the victim told police. The women, hooded, but bare-faced, also entered the apartment.

The victim’s girlfriend came to the door, asking to be let in. The victim refused initially to open the door, but opened it after one of the defendants threatened to harm the baby.

The two victims were kept on the floor. The men demanded the victims give them money. The male victim recognized one of the male defendants, he told police.

One of the female defendants struck the female victim on the back of the head with one of the guns. The male victim showed one of the defendants where the couple’s cash was hidden.

The couple was covered with a blanket — the female victim was given her baby — before the four defendants fled.

Others charged in this case were:

* Jeremy M. Bourgoin, 28, of Litchfield, who pleaded guilty to robbery, theft and two counts of assault with a dangerous weapon, all felonies. He was sentenced last month to 12 years in prison, with all but four years suspended, plus four years of probation.

* Nicholas Lowell, 26, of 48 Spring St., Lewiston, who pleaded guilty in May to robbery, two counts of assault with a dangerous weapon and theft. He was sentenced to 12 years in prison with all but six years suspended, plus four years of probation. Lowell had pending drug charges.

* Cortney Pearl, 23, of 38 Morissette Drive, Sabattus, who pleaded guilty to burglary, two counts of assault with a dangerous weapon, theft and criminal threatening, all felonies. She was sentenced to eight years in prison with all but two years suspended, plus two years of probation.

* Brandy N. Sylvester, 21, of 80 Fern St., Turner, who is awaiting trial on charges of robbery, burglary, theft, criminal threatening and two counts of assault.

The presiding judge ordered each of the defendants separately or together to repay the victims up to $1,300.

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