EDCOUCH – Juan Perez tells CHANNEL 5 NEWS his beloved pit bull “Duce” was poisoned on Valentine's Day. Perez recalled watching the dog breathe his last breath.

"It was hard to see him go like that," said Perez.

His uncle Domingo claims he saw a person feed Duce moments before the dog passed away.

"He just threw a piece of meat across the fence," said Juan's uncle, Domingo Perez.

Edcouch police tell us three owners reported a total of ten dead dogs this week. Each died inexplicably. The specific cause of those deaths remains unknown.

Chief Eloy Cardenas of the Edcouch Police Department says there's a strong possibility the dogs were poisoned.

"We've come to the conclusion that they were not run over," said Cardenas. "They were not shot, nor were they stabbed, that was very obvious to the obvious eye."

Edcouch police say seven of those dogs belonged to a single owner and all ten dogs lived in the same neighborhood. Investigators say the cases have some things in common.

"We are looking at this to be similarities in the cause of what might have caused their demise,” said Cardenas. “so we are looking at one particular person or persons being responsible for these three separate incidents."

Police have a person of interest; a heavy set, tall individual according to an eyewitness description. They say the person was riding a dirt bike. The Perez family is seeking justice.

"For him to understand the consequence and some of the pain and suffering that he's caused the family members," said Juan Perez.

The Edcouch Police Department encourages anyone with information to come forward.