Kirby was sentenced to 37 years, Brewer was sentenced with 7 years in prison and Lewis was sentenced to 14 years in prison.
Engel was alone inside his Greenlee Avenue home in March of last year when he was robbed and beaten to death, according to police.
Police say the three suspects broke in the front basement window of Engel's home to rob it a few days before. The men were ransacking it while the woman served as the lookout.
Engel came home and surprised them, court records show.
Kirby and Lewis were in the upstairs hallway as Engel climbed the stairs to his bedroom. As Engel approached the top of the stairwell, Kirby "began a violent assault," court records show.
The attack continued back downstairs into the kitchen and ultimately resulted in Engel's death. The father of two grown children died of severe blunt force trauma to his upper body and head as well as loss of blood, court records show.
The three suspects fled the home to St. Mary's Cemetery nearby, where police on routine patrol spotted them trying to destroy physical evidence.