May 27, 2016 09:10 AM

Family members of Terri “Missy” Bevers, the Texas fitness instructor killed last month inside a church where she taught classes, have weathered the whispers and online speculation about suspects, some of which has pointed at them.

But with police in Midlothian, Texas, saying that no relatives, friends or coworkers of Missy are currently under suspicion more than a month after the murder, those relatives find themselves grasping for answers like everyone else.

“When they make an arrest, are we going to celebrate, or would we feel bad about celebrating?,” Missy’s mother-in-law Marsha Tucker tells PEOPLE.

“I don’t know how we’ll feel,” she adds. “But I’m ready to find out.”

To read more about the new clues in the search for Missy Bevers’ killer, pick up this week’s issue of PEOPLE on newsstands Friday.

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Missy, 35, an instructor with Camp Gladiator, was due to lead a 5 a.m. fitness boot camp at Creekside Church on April 18 when one of her students arrived to find her crumpled on the church floor, with what police later described as fatal puncture wounds to her head and chest.

A surveillance video from inside the building had earlier captured a hammer-wielding intruder who broke in about 3:50 a.m, dressed in concealing SWAT-like gear designed to look like a police officer. Missy arrived about 30 minutes later, but neither a confrontation nor the suspect’s exit is seen on the video.

Tucker thinks her daughter-in-law, who regularly posted times and locations for her classes online, was targeted. Police estimate the intruder’s height at between 5-feet-2-inches and 5-feet-7-inches, but otherwise have not been able to identify a gender from the video – except to say the suspect may have a possible right leg injury and “appears to have what has been described as a feminine sway or walk.”

Missy Bevers
Courtesy Bevers Family

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Missy’s husband, Brandon, 42, told PEOPLE he thinks the intruder may have been a woman and someone she knew.

More questions arose after search warrants said Missy’s social media exchanges revealed “an ongoing financial and marital struggle,” along with communications outside of her marriage that were “flirtatious and familiar.”

But the revelation has drawn the family closer to Missy’s side. Before that news broke, police gathered family members, including Missy’s husband, to alert them.

“[Brandon] sat there – I was there – and he goes, ‘I’ve already forgiven her,” says Tucker, who played Cupid to bring Brandon and Missy together. The couple married in 1998, and were parents to three girls ages 8, 13 and 15.

“I know he has absolutely been cleared and he’s okay,” Tucker said of her son. “As for other people who have been brought into question, I feel for them if they’re innocent.”

Also unanswered: Less than three days before her death, Bevers showed a friend a message she’d received on the LinkedIn social networking site from a man neither knew, which they agreed was “creepy and strange,” according to police. And police still are looking for the driver of a light-colored Nissan Altima seen in a parking lot near the church about 2 a.m. on the day of the attack.

Anyone with information is asked to call police at 972-775-7624.

Reporting by DARLA HIGGINS

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