UDPATE (KCEN) -- The original vehicle was located, but there is no new vehicle information.
SAN ANTONIO (WOAI) -- A local Amber Alert has been issued for a baby who police say was taken by his own father.
Police say Jonathan Guillen took off with his son, 11-month-old Jonathan Jose Guillen Jr., after Guillen killed his mother's estranged boyfriend last Thursday. The two were last seen in the 2300 block of Austin Highway.
Guillen is a 23-year-old Hispanic male who is about 5' 08" tall, weighs about 185 pounds, and has brown hair and brown eyes. He was last seen wearing a white muscle shirt and black or red shorts.
Jonathan Jose Guillen Jr. has brown hair and hazel eyes. He was last seen wearing blue jeans and a red-hooded sweatshirt.
Police said they are searching for a 2002 black Chevy Trail Blazer. The SUV has Texas license plates with the number 7CZTJ and a bottom plate with the word "disabled" on it.
If you have any information about the whereabouts of Guillen or his son, please immediately call 911 or contact Crime Stoppers at 224-STOP (7867), submit a tip online, or text a tip by texting "Tip 127 plus your tip" to CRIMES (274637).
Callers can remain anonymous and are eligible to receive a cash reward if the information given leads to an arrest or grand jury indictment of a felony offender.