SEGUIN, Texas -

Charged with injury to a child resulting in serious bodily injury, Seguin police said 18-year-old Manuel Joe Sandoval is accused of attacking a 13-year-old boy with a baseball bat in what is being called “a random act of violence.”

“He was in the wrong place at the wrong time,” Detective Clint Halbardier said about the victim, Moises Sandoval, who was not related to Manuel Joe Sandoval

Halbardier said the boy has been in critical condition with massive head trauma at the Dell Children’s Hospital in Austin.

“His injuries were very serious, so we acted as quickly as we could to find who did it,” Halbardier said.

The detective said an anonymous tip led to Sandoval’s arrest on Tuesday, and another is likely pending further investigation.

Sandoval is being held under $100,000 bond in the Guadalupe County Jail.

Emily Sandoval, the boy’s mother, thanked Seguin Police for taking him into custody within days of the attack.

She said Moises, also known as “Tito,” was at home with his older brother about 1 a.m. Sunday when a friend came over.

The victim’s mother said Moises and his friend were walking outside their home when they were confronted.

“They mistook him for somebody else,” Sandoval said.

Alan Harrison, a neighbor down the street, said he ran outside when he heard the boy screaming.

Harrison said he saw Sandoval with a baseball bat in his left hand, running toward a waiting vehicle with a man in the passenger seat.

Before the suspect drove away, Harrison said, “I just stared at him for about 30 seconds or so.”

“They ran the stop sign, no lights. They just took off,” Harrison said.

After calling 911, Harrison said he rushed to the boy’s side, along with Moises’ older brother.

Harrison said he felt helpless waiting for the ambulance to arrive.

“There was nothing I could do. I couldn’t move him,” Harrison said. “It was just really ugly. He just had so much blood on him.”

However, Moises mother said if Harrison had not come out, “They would have kept beating him with a bat.”

Harrison said his only regret was, “I just wish I had been out there sooner.”