KEELING, Va. -- Tampa Bay Rays minor leaguer Blake Bivens said his "heart was turned to ash" when his wife, 1-year-old son and mother-in-law were killed this week.

"My life as I knew it is destroyed," the 24-year-old pitcher wrote Thursday night in an Instagram post, his first public statement since the slayings. "The pain my family and I feel is unbearable and cannot be put into words. I shake and tremble at the thought of our future without them."

Two days ago my heart was turned to ash. My life as I knew it is destroyed. The pain my family and I feel is unbearable and cannot be put into words. I shake and tremble at the thought of our future without them.... https://t.co/StvSMk8OQr

— Blake Bivens (@blakebbins) August 30, 2019

Bivens flew from a road trip back to southern Virginia when he learned of Tuesday's tragedy. He was accompanied by Montgomery Biscuits manager Morgan Ensberg.

"It was awful," Ensberg said. "Blake is an incredibly strong man. He's an incredibly strong man, and he went through just a rotation of tearing up, and then he would shake and then he would just stare.

"I didn't let him out of my sight."

The 18-year-old brother of Bivens' wife has been charged with first-degree murder in the slayings, which have shocked Bivens' coaches, teammates and the community where his family lived.

"You don't wish this on any community, any family," Pittsylvania County Sheriff Mike Taylor said. "We're a small community. It affects us all."

Bivens posted a series of photos of his wife, Emily; 14-month-old son, Cullen; and mother-in-law, Joan Bernard.

"Emily, my sweetheart, you are the best wife and mother this world has ever seen," he wrote. "You made me into the man I am today and you loved me with all of my flaws. You brought our precious baby boy into this world and made our family complete. Your love and kindness changed countless lives, including mine."

Of Cullen, Bivens wrote: "I can't breathe without you here" and, "I finally understood what love was when you were born and I would have done anything for you."

Court documents released Thursday revealed new details in the slayings but did not explain what could have driven 18-year-old Matthew Bernard to allegedly kill his sister, nephew and mother.

In Montgomery, Alabama, the Biscuits -- a Double-A affiliate of the Rays -- painted "BIV" on the ground behind home plate before a game against Pensacola. They were to hold a moment of silence before the game, with another planned before the Rays' home game Friday against the Cleveland Indians.

For Blake. pic.twitter.com/nLYL7TnTdZ

— Montgomery Biscuits (@BiscuitBaseball) August 29, 2019

"Nobody's thinking about baseball," Ensberg said.

Montgomery pitching coach R.C. Lichtenstein remembers pregame moments when Bivens would walk over to see his wife and hold Cullen.

Biscuits pitcher Ryan Thompson said Bivens' family was on his mind "all the time."

"His family was everything to him," said an emotional Thompson, who described Bivens as a close friend with a "hilarious" sense of humor.

"He never lets the game get in the way of who he is as a human being. He's such a great guy, and something like this couldn't happen to a better human being," Thompson said.

According to the complaint filed against Bernard, the teenager's rampage began Tuesday morning at a neighbor's house. Bernard punched the neighbor in the arm and then ran away, police said.

The neighbor then heard gunshots at the house next door, police said. The neighbor drove to the house and found a woman's body in the driveway. Inside, she found the other two bodies.

Officers found two victims with gunshot wounds to the head and rifle shell casings near all three bodies.

A rifle was found in a wooded area behind the house and a sledgehammer with blood was found in the garage, the court documents said.

The criminal complaint did not offer any motive for the killings, and authorities have declined to comment.

After the bodies were discovered, a manhunt brought as many as 100 officers to Keeling, a tiny community near the North Carolina border.

Bernard emerged naked from the woods about four hours later, running past TV cameras to a church parking lot, where he was recorded trying to choke a church caretaker.

An officer used pepper spray and struck Bernard with a baton before he was captured, officials said.

Bernard banged his head against the cage in a police vehicle after being taken into custody and was taken to a hospital for treatment, police said. He was released and was in jail Thursday, where he was being held without bail and kept on suicide watch, police said.

A celebration-of-life service for the slain family members is planned for Saturday.

A vigil was held at The River Church in Danville, Virginia, on Wednesday night. Senior pastor Jackie Poe led those in attendance in prayer for the Bivens and Bernard families.

Avery Stevens, pastor of Keeling Baptist Church, said he was in his office where he also works as an insurance agent when he saw the television coverage of Bernard's capture near his church.

"This is a small, rural community, pretty quiet most of the time like most small, rural communities. But the fact of the matter is, it can happen anywhere, and right there at the doorstep," he said.

"Pray for the family," he said. "Praying for the community. Praying for healing."