Assuming you mean Barty Crouch Jr. - he turned his father's body into a bone after killing him and then buried the bone into Hogwarts's grounds.
Barty Crouch smuggled his son out of Azkaban, using Polyjuice Potion to disguise him as his mother. Barty's son then spent several years hidden away and imprisoned in the family home. He was eventually freed from his father by Voldemort.
Barty Crouch died because he had figured out that the "Mad-Eye" Moody that was there was really his son, Barty Crouch Jr. So barty jr. decided to kill his father so nobody else would know he was there and ruin his plan to get Harry to the graveyard for Voldemort.
Barty Crouch Sr was murdered by his son, Barty Crouch Jr who transfigured his body into a bone and buried it in order to avoid detection. Barty Crouch Jr was given the Dementors kiss, a fate described as worse than death.
Barty Crouch Jr costs 900,000 studs on Lego Harry Potter.
Barty Crouch Junior
Barty Crouch Junior is a Death Eater and is bad but his father Barty Crouch Senior is very good; he loaths Dark Wizards.
Barty Crouch Jr.
Barty Crouch smuggled his son out of Azkaban, using Polyjuice Potion to disguise him as his mother. Barty's son then spent several years hidden away and imprisoned in the family home. He was eventually freed from his father by Voldemort.
Barty Crouch Jr is played by David Tennant.
Barty Crouch died because he had figured out that the "Mad-Eye" Moody that was there was really his son, Barty Crouch Jr. So barty jr. decided to kill his father so nobody else would know he was there and ruin his plan to get Harry to the graveyard for Voldemort.
Barty Crouch Sr was murdered by his son, Barty Crouch Jr who transfigured his body into a bone and buried it in order to avoid detection. Barty Crouch Jr was given the Dementors kiss, a fate described as worse than death.
Barty Crouch Jr costs 900,000 studs on Lego Harry Potter.
Crazy
In the memory that Harry see's in the pensieve, Karkaroff is questioned by Barty Crouch Sr. (I think!)
If you mean after the Quidditch World Cup, those were Death Eaters. They are the minions/followers/henchmen of Voldemort. Some of them include Lucius Malfoy, father of Draco, Marcus Goyle, father of Gregory, Nathen Crabbe, father or Vincent, Barty Crouch Junior, son of Barty Crouch Senir, Igor Karkaroff, Alecto Carrow, and Amycus Carrow.
David tennant played Barty Crouch Jr in Harry Potter and the Goblet of Fire.
Barty Crouch Jr.