Sirius Black didn't kill those thirteen muggles. Peter Pettigrew, who was the friend who betrayed James & Lily (Harry's parents), was being chased by Sirius Black, who was irate and devastated at the death of his best friends. Peter saw there was no way for him to escape, and so cut off one of his fingers and pretended to blow himself up (but really just changed into his rat animagus form), framing Sirius. This explosion is what killed the 13 people, and Peter Pettigrew's framing was what caused sirius to be blamed and set to azkaban.
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If you read the books, which have way more details, you would know, but he did not kill them.
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Sirius Black.
Harry Potter's father is James Potter and Arthur Weasley is his father-in-law. He was raised by his mothers sister and her husband, Petunia and Vernon and Aunt Petunia Dursley His godfather was Sirius Black.
Mcgonagle, James potter, Sirius Black, Peter Pettigrew, And the rest are in the third book (Harry potter and the prsoner of azkaban)
Sirius Black from Harry Potter real name is Gary Oldman.
Walburga Black, the mother of Sirius and Regulus Black.