Manslaughter is defined as homicide without the intent to kill. For this reason, it is less serious than a murder charge, which will always lead to jail time if a conviction is made. However, there are different degrees of manslaughter, and while some always lead to jail time, others have a chance to enable you to avoid jail time. As always, it depends on the circumstances.
Ishmael was the first son of Abraham. His mother was Hagar, who was the Egyptian handmaid to Sarah, who was Abraham's wife. Ishmael was the half-brother of Isaac, who was the son of Abraham and Sarah. Sarah had been unable to have children. So she presented her maid, Hagar, to Abraham to bear an heir for Abraham.
Of those that say Ishmael took part in the construction, most describe Abraham visiting Ishmael a third time in Mecca, during which they raise the Kaaba. Some versions say Abraham has Ishmael look for a final stone, but Abraham does not accept the one he brings back. Instead an angel has brought the Black Stone, which Abraham puts into place. Ishmael is left at the Kaaba, in charge of its care and to teach others about the Hajj.